Factor completely 49x2 − 81. a. (7x 9)2 b. (7x − 9)2 c. (7x 9)(7x − 9) d. 7x − 9

asked Jun 10, 2017 27.4k views

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Factor completely 49x2 − 81.

a. (7x 9)2
b. (7x − 9)2
c. (7x 9)(7x − 9)
d. 7x − 9

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5 votes

Answer:

The other person is correct it is c. (7x 9)(7x − 9)

Raelynn answered Jun 12, 2017

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Use the property
(a -b)(a+ b) = a^2 - b^2

49x^2 - 81 = (7x + 9)((7x - 9)

Nagarajannd answered Jun 16, 2017

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