vjennifer574p3jczc vjennifer574p3jczc

25-07-2018
Mathematics

contestada

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

Respuesta :

choixongdong choixongdong

25-07-2018

(x+3)(x-3)

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

=x^2 - 9

Answer

B) x^2 -9

Answer Link

Peredhel Peredhel

25-07-2018

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

Answer Link

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