Question

factor this binomial;
x^2-81

Answer 1

(x-9)(x+9)

Answer 2

kanwar you should stop posting direct answer and help these people learn

Answer 3

thanks i hate factoring -.- and is there any steps to it?

Answer 4

what your looking for is a number that multiples to -81 and adds up to zero

Answer 5

OHHHH OK I GET IT thanks :)

Answer 6

any binomial will have the form
\[x^{2}+(a+b)*x+(a*b)\]

Answer 7

do you see how the term in front of x is a+b and the last term is a*b

Answer 8

(x-9)(x+9)
we know this because to get [x ^{2}\] you have to multiply x.x and since the 81 is negative, the only way you can get that is by multiplying a positive times a negative. when you multiply this out to check yourself, you'll find the +9x term and -9x term cancel, giving you x^2-81

Answer 9

yes thank you everyone !