Question

if ( u = -2 ), what is ( sqrt{-1 - u} )?

Explanation:

Step1: Substitute u = -2 into the expression

$\sqrt{-1 - (-2)}$

Step2: Simplify the radicand

$\sqrt{-1 + 2} = \sqrt{1}$

Step3: Calculate the square root

$\sqrt{1} = 1$

Answer:

1