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Difference of squares. \[a^2-b^2=(a+b)(a-b) \]
Ok so what would that make the binomials?
I just hate binomials i can't ever get them.
a+ b <---first binomial a - b<---second binomial just substitue a and b to the right values
Yes that's what I am having trouble finding though. Because the question states write 2 binomials whose product is x squared - 25
I have no clue, i know that sounds stupid
I just hate doing math anyways so it's confusing to me even when i do binomials.
okay here's a hint \[a^2 - b^2 \implies (a+b)(a-b)\] so \[x^2 - 4 \implies (x + 2)(x-2)\] \[x^2 - 9 \implies (x+3)(x-3)\] \[x^2 - 16 \implies (x+4)(x-4)\] are you getting it now?
so a bionomial for x squared -25 could be (x+5)?
yes that's one of the binomials...what's the other?
would it be (x-5)?
yes. the binomials for x^2 - 25 is (x+5)(x-5) congrats
well see when i typed that in my program on my computer i have to do this math on it said it was incorrect
that's why i hate those computers lol. so picky
try putting them in one by one
i did i tried the x + 5 first
shouldnt make a difference but...try putting x-5 first?
Should I put the ( ) or not?
and it says type your answer in factor form so what would that be
so the (x+5)(x-5) is factor form?
yes (x+5)(x-5) is factor form...
can i ask you another math question
The number of ways a teacher can award different prizes to 2 students in class having n students is given by the formula p(n)=n(n-1)
use this formula to determeine the number of ways a teacher can award different prizes to 2 students in a class having 6 students
substitute 6 into n in the formula
then it says to rewrite the formula by multiplying the factors
yes. substitute 6 into n in the formula...
ok so the formula would be P(6)=6(6-1)?
just a couple more questions i promise
when i tried typing that the other way it said multiply the two factors of the expression for p(n) given in the problem statement to write the expression in a different way
i dont get what you're asking
It's just saying to rewrite the formula in a different way
by multiplying the factors
just substitute 6 into n...isnt that what you did?
Yea i did that for the first answer but it's not right for the second one
so the answer would be 30 right that simplified
but that's not the formula
can i give u my math xl login info and let you look at it?
the formula is what you wrote first
the simplified is the second answer
So the first formula was p(n)=n(n-1) then it was P(6)=6(6-1) then it was P(6)=6(5) and then P(6)=30
But when it said to multiply factors and write the formula over I have no idea
multiply the factors means you multiply the factors <--that will give you 30 write the formula over is just copying the formula but substitute 6
ok so my answer box already has P(N)= so i need to put 6 X 5
if the start is p(n) = then you rewrite the formula... n(n-1)
omg it said it wasn't in correct form that time but it was correct
lol. these computers are confusing me now o.O
I know right I don't know how to put it
sorry kid. cant help you with your computer problems.
i have to go now so i wish you luck that you finish this
thanks soooo much for your help