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Studentka2010 [4]
3 years ago
11

Factor completely 49x2 − 81. (1 point)

Mathematics
2 answers:
insens350 [35]3 years ago
7 0

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)


mart [117]3 years ago
3 0

49x2 − 81

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

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