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Mathematics 8 Online
OpenStudy (anonymous):

Factoring this! 49n^2-16

OpenStudy (anonymous):

both 49 and 16 are perfect squares. Do you know what that means?

OpenStudy (anonymous):

the square root of 49 is 7 7 times 7 = 49 The square root of 16 is 4 4 times 4 = 16

OpenStudy (anonymous):

so what times itself equals 49n^2?

OpenStudy (anonymous):

7n

OpenStudy (anonymous):

Wait. Is the answer (7n-4)(7n+4)?

OpenStudy (anonymous):

yup :)

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