Frequent Questions about our Solver

The problem

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I don’t understand how you got from step one to step two

Answer provided by our tutors

We use the following: the 2nd root of 'x' can be written as a fractional exponent with 'x' raised to the reciprocal of that power, that is, 1/2:

In your problem we have:

Since, 16 = 2^4.

Next, the square root (2nd root) is replaced with exponent '1/2':

We also use the property: 

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