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iwanttogotostanford
 one year ago
Please HELP:
Using the completingthesquare method, rewrite f(x) = x^2 + 4x − 1 in vertex form.
f(x) = (x + 2)^2 + 1
f(x) = (x + 2)^2
f(x) = (x + 2)^2 + 4
f(x) = (x + 2)^2 − 5
iwanttogotostanford
 one year ago
Please HELP: Using the completingthesquare method, rewrite f(x) = x^2 + 4x − 1 in vertex form. f(x) = (x + 2)^2 + 1 f(x) = (x + 2)^2 f(x) = (x + 2)^2 + 4 f(x) = (x + 2)^2 − 5

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jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.0do you know what a "perfect square trinomial" is? sometimes just called a "perfect square"

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1\[x^2+bx+c=(x+\frac{b}{2})^2+c\frac{b^2}{4}\]

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0would it be D then?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0\[f(x) = x^2+4x1\]\[=(x^2+4x)1\]\[=(x^2+4x+\color{red}{4})1\color{red}{4}\]\[=\boxed{(x2)^25}\]

jdoe0001
 one year ago
Best ResponseYou've already chosen the best response.0so... \(\bf f(x)=x^2+4x1\implies f(x)=(x^2+4x+{\color{red}{ \square ?}}^2)1\) what do you think is the missing number?

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.1correct @iwanttogotostanford

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0@jdoe0001 why isn't `\boxed` working for me?

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0Which of the following values "completes the square," or creates a perfect square trinomial, for x2 + 6x + ___? 1 3 6 9

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0i believe its 9 but i just want to make sure

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0\[c=\left(\frac{6}{2}\right)^2 = ~?\]

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0\[\color{red}{\checkmark}\]

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0i really need help with this one real quick, thanks for all your help..:)

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0Solve x2 + 8x − 3 = 0 using the completingthesquare method. x = four plus or minus the square root of three x = negative four plus or minus the square root of three x = four plus or minus the square root of nineteen x = negative four plus or minus the square root of nineteen

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0use the method we used above.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0I don't know,I didn't solve it.

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0could you help me? :_)

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0first add +3 to both sides.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0what do you get, @iwanttogotostanford ?

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0the same but on the left 6 and on the right 3

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.0okay, if you add +3 to both sides , the answer i was looking for is, x\(^2\)+8x=3

iwanttogotostanford
 one year ago
Best ResponseYou've already chosen the best response.0@Jhannybean sorry, i was gone
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