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OpenStudy (anonymous):
simplify... square root 28, times, square root 63
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OpenStudy (saifoo.khan):
42
OpenStudy (anonymous):
How did you do that? Did you just multiply 28 by 63 and then find the square root of the answer?
OpenStudy (mathmate):
sqrt(28)*sqrt(63) =sqrt(28*63) =sqrt(4^2*7^2*3^2) =4*7*3 =42
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