Find the product of (x + 3) (x - 3). a. x2 - 6x + 9 b. x2 + 6x + 9 c. x2 + 9 d. x2 - 9

Question

Mathematics

Sarah Lyons

27 April, 00:32

Find the product of (x + 3) (x - 3). a. x2 - 6x + 9 b. x2 + 6x + 9 c. x2 + 9 d. x2 - 9

+3

Answers (1)

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Camilla Daugherty · Answer 1

Distribute

if we have

(a+b) (c+d) = (a+b) (c) + (a+b) (d) = (ac) + (bc) + (ad) + (bd) so

the way I like it is

x times x=x^2

3 times x=3x

x times - 3=-3x

3 times - 3=-9

add them together

x^2 + 3x-3x-9

x^2-9 is the naswer