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1 vote
Factor completely 49x2 − 81. (1 point)

2 Answers

1 vote

For this case we have a difference of perfect squares of the form:


a ^ 2-b ^ 2 = (a + b) (a-b)

Applying to the given exercise we have to:


a = 7x\\b = 9

So, we have:


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

Thus, the factorization of
49x ^ 2-81 is given by:


(7x + 9) (7x-9)

Answer:


(7x + 9) (7x-9)


4 votes

49x2 − 81

(7x-9) (7x+9)

User Vitaliy Yanchuk
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