it is the square root of 16 which equals 4.
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It is: 2 times the square root of 2
Sq root of 2 * sq root of 8 = 1.414 * 2.828 = 3.998792
=SQRT(5)*SQRT(2)+SQRT(8) is 5.99070478491457
the square root of 4 is 2 so you just multiply 4 times 2. the answer is 8
The square root of 8 is 2 multiplied by the square root of 2