Expressed as a surd, 4 sqrt(6) / 4 sqrt(8) = 4 sqrt(3).
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The square root of 25 divided by 4 = 1.25
4 has two square roots. They are +2 and -2.
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Square roots can be multiplied by multiplying the numbers under the square root. For example, sqrt(4) * sqrt(5) = sqrt(4*5) = sqrt(20). They can then be simplified by doing the opposite, splitting them apart. sqrt(20) = sqrt(4) * sqrt(5) = 2 * sqrt(5).
Every positive number has TWO square roots. The principal square root is the positive number which, when multiplied by itself, gives the number in question. But its negative equivalent will also be a square root. For example, the number 4 has 2 as the principal sqrt but -2 is also a sqrt of 4