Question

find the product of (x+3)(x-3)

Answer 1

Firsts Inners Outers Lasts. X•x, -3•x, 5•x, -3•5= x^2 - 3x + 5x - 15. Which is x^2 +2x - 15

Answer 2

:) ok

Answer 3

what you do here, as damara tried to explain, is FOIL

(x+3) (x-3)
F irst
x*x=x^2
O utside
x*-3=-3x
I nside
3*x=3x
L ast
3*-3=-9

Therefore, your final equation is x^2-9

Answer 4

Does that make sense? @bangbang559 ?

Answer 5

You can also make use of the identity:
(A+B)(A-B) = A^2 - B^2

Answer 6

thank you so much

Answer 7

np :)