Question

what is (x-42)(13x+15)?

Answer 1

Use FOIL (front, outside, inside, what's left)
First do x*13x, then x*15, then -42*13x, then -42*15.\[(x-42)(13x+15)=13x^2+15x-546x-630\]
Then simplify by combining like terms (only 15x and -546x will combine)
so you end up with
\[13x^2-531x-630\]

Answer 2

thanks

Answer 3

No problem. Best response? :)

Answer 4

i gotchyo bak @rkfitz053 :P

Answer 5

Haha, thanks