Question

The factors of c² - 9d² are_______ (choose correct options)
(A) (c + 3d)(c - 3d) (B) (c - 3d)(c - 3d) (C) (c - 9d)(c + d) (D) none of these.​

Answer 1

Answer:

A

a²-b²=(a-b)(a+b)

c²-(3d)²= (c-3d) (c+3d)

Answer 2

Answer:

$(A) (c-3d)(c+3d)$

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Step-by-step explanation:

$Using \ formula \ (a^2 - b^2) = (a-b)(a+b)$

$c^2 - 9d^2 = c^2 - (3d)^2 = ( c-3d )(c+3d)$