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square roots

Expert replies
Source: — Problem Solving |

by kishore » Mon Jul 14, 2008 7:46 pm
If y > 0, which of the following is equal to sq.48y^3

Answer:
(A) 4y sq. rt. 3y


sqrt(48 * y^3)

= sqrt(16 * 3 * y ^2 * y)

= sqrt(16) * sqrt(3) * sqrt(y ^2) * sqrt(y)
= 4 * sqrt(3) * y * sqrt(y)
= 4y sqrt(3*y)
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