Simplify the square root of 16y^4. Assume that the variable y represents a positive real number?  

Expert Answers

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Think 4*4*y*y*y*y.  Now we need to factor this into two equal groups:

4*y*y * 4*y*y

`4y^2*4y^2`

So `sqrt(16y^4)` = `4y^2`

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