Question

Find the product? (3p-7)(3p+7)
A.9^2+49
B.9^2-49
C.9^2-42P-49
D.9^2+42P+49

Answer 1

you would have to know that
\[(a-b)(a+b)=a^2-b^2\]

Answer 2

9p^2+21p-21p-49=9p^2-49

Answer 3

using that we have
\[(3p-7)(3p+7)=(3p)^2-(7)^2\]
\[=9p^2-49\]

Answer 4

thancks Beautiful Girls:)

Answer 5

yw