Question

Multiply (x+3)(x-3)
A) x^2 +6x+9
B) x^2 -9
C) x^2 + 6x-9
D) x^2 - 6x +9

Answer 1

(x+3)(x-3)

=x^2 + 3x -3x - 9

=x^2 - 9

Answer

B) x^2 -9

Answer 2

Hi!

We can remove the parentheses.

x+3·x-3

Group together like terms.

x·x+3·-3

x²-9

The answer is B) x²-9

Hope this helps! :)

-Peredhel