Question

b $(-1 + -1) cdot (-1 - -1)$

Explanation:

Step1: Simplify first parentheses

$(-1 + -1) = -2$

Step2: Simplify second parentheses

$(-1 - -1) = (-1 + 1) = 0$

Step3: Multiply the two results

$(-2) \times 0$

Answer:

$0$