Question

Evaluate \sqrt{-72k} −72k square root of, minus, 72, k, end square root where k = -2k=−2k, equals, minus, 2

Answer 1

12

Explanation:

trust me

Answer 2

12

Explanation:

To evaluate the given expression for the given value of k, put that value into the expression in place of k, then do the arithmetic.

`√(-72k)\qquad\text{for $k=-2$}\\\\√((-72)(-2))=√(144)=12\qquad\text{positive square root}`

The value is 12.