Question

Evaluate the expression for x = -1.

-l -x l + l x l

Answer 1

it is 0

Explanation:

answer 0

Answer 2

Explanation:

-l -x l + l x l = -I -(-1)I + I -1I {absolute value is always positive}

= - I 1 I + 1 = -1 + 1 = 0