Question

(x + 2) (x-9)

Answer 1

=x^2-7x-18

Answer 2

is this equal to something?

Answer 3

or are you just told to multiply the facts to give an expression?

Answer 4

multiply the facts to give an expression.

Answer 5

done

Answer 6

what does ^ mean?

Answer 7

raised to the power.

Answer 8

oh okay, thanks.

Answer 9

did you understand what Maph did there though?

Answer 10

9 x 2 = 18 but i'm not sure how Maph got the 7

Answer 11

remeber when doing a problem like that to use foil (first,outside,inside, last) then combine like terms to end up with the answer

Answer 12

thanks zbay.

Answer 13

okay, multiply the two terms and note that (a+b)*(c+d)= a(c+d) +b(c+d) = ac+ad+bc+bd
so,
(x+2)(x-9) = (x*x +2x-9x-18) = x^2-7x+18 (since 2x-9x = -7x)

Answer 14

whoops, that is -18 at the end there.