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brodybarnes35
 one year ago
Which of the following represents the factored form of f(x) = x^3 − 64x?
f(x) = x(x + 8)(x − 8)
f(x) = (x − 8)(x + 8)
f(x) = x(x − 8)^2
f(x) = x(x^2 − 8)
brodybarnes35
 one year ago
Which of the following represents the factored form of f(x) = x^3 − 64x? f(x) = x(x + 8)(x − 8) f(x) = (x − 8)(x + 8) f(x) = x(x − 8)^2 f(x) = x(x^2 − 8)

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brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0idk :/ thats embarrassing wow

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0but really idk could you explain

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0ohhhh im so stupid sorry X

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0no thats 63 my b

Hero
 one year ago
Best ResponseYou've already chosen the best response.1@brodybarnes35, what happens to the expression after you factor out the x?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0so its either a or b right

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0a or b right @mehek14 @hero ?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0@Nnesha can you help?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1first find GCF(greatest common factor ) so there is x common in both terms right ? now take out the x from x^3 and 64x or in other words divide both terms by common factor \[\rm x^364x=x(??????)\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439937064914:dw divide both terms by common factor and write your answer in the parentheses.

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0if you divide by x the outcome would be the same?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1not yet.there is one more step. just divide x^3 by x and then 64x by x

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0= x^3 =64x the outcome is the same when you divide...or am i doing it wrong

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0wait does the x disappear?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1i don't get it. what do you mean? x^3 over x isn't equal to x^3

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1x^3 is same as x times x times x \[\huge\rm \frac{ x \times x \times x }{ x }\]can you divide now?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1x^3 is same as x times x times x \[\huge\rm \frac{ x \times x \times \cancel{x} }{\cancel{ x }}\]how many x's wre there ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1x^3 is same as x times x times x \[\huge\rm \frac{\color{Red}{ x} \times\color{Red}{ x} \times \cancel{\color{Red}{x}} }{\cancel{ x }}\]how many x's wre there ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1no when you multiply same bases you should add their exponents \[\huge\rm x^m \times x^n = x^{m+n}\] when you ADD same bases then you should add their coefficient 1x+1x=(1+1))x=2x

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1and x is same as x to the one power \[\rm x^1 \times x^1 =x^{??}\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1right so x^3 over x = x^2dw:1439937679559:dw now divide 64x over x ?

Hero
 one year ago
Best ResponseYou've already chosen the best response.1Another way to understand factoring is to think of it in terms of the distributive property. ab + ac = a(b + c) In other words, a is common to both terms on the left so we factor it out to get the expression on the right.

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0ummm that would be 64x^2?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1\[\frac{ 64x }{ x} = ?\] here you have to divide by x what would get when you divide same bases ? like 2/2 = ?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.02/2 = 1 right so 64x would be 64x?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1you are right. 64x would be 64x but what is \[\huge\rm \frac{ 64\color{Red}{x} }{ \color{Red}{x} } = ?\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1Take out x from 64x. that's it.

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0omg wow that was simple . im dumb

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1so when you take out x from 64x what will u have left with ?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0ok so what happens now lol?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439938027333:dw \[\huge\rm x(x^264)\] now apply the difference of square method \[\huge\rm a^2b^2=(a+b)(ab)\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1\[\huge\rm x(\color{red}{x^264})\] now apply the difference of square method \[\huge\rm a^2b^2=(a+b)(ab)\] take square of both terms in the parentheses write ur answer as (sqrt of 1st term + sqrt of 2nd term)(sqrt of 1st term  sqrt of 2nd term )

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1that's the original equation what about it ?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0what a and what is b

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1a and b are variables a = first term b= 2nd term

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0yeah but what are they like number wise..

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0x^2  64^2 = ( x2 + 64) ( x2  64)?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1no take square root of both terms look at the equation i gave you it's not \[\huge\rm a^2b^2\cancel{=}(a^2b^2)(a^2+b^2)\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1how did you get b? what about common that's outside the parentheses?

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0because just they look alike (  )( + ) the signs match... am i right

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439938542139:dw take square root of both terms write your answer in the parentheses

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1don't look at the answer choices

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1she is not gonna be there when you have to take final exam.

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0(x  8)(x + 8) right?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1that should go in the parenthesesdw:1439938908541:dw common should stay there outside the parentheses.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yesdw:1439938990977:dw

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0ok thanks can you help with one more?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1@ana123456 don't give out direct answer especially when someone spnd one HOUR to teach.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1and sorry i have to go :) good luck!!

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0ana can you help lol

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0one more question pls

brodybarnes35
 one year ago
Best ResponseYou've already chosen the best response.0nvm i got it thanks
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