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OpenStudy (anonymous):
Factoring this! 49n^2-16
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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)?
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OpenStudy (anonymous):
yup :)
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