Question

Evaluate the expression below for x = 2, y=-3, and z=-1.

x2 z2 - y2(x+z)
A. -23
B. -5
C. 13
D. 27

Answer 1

It should be B

Explanation:

2 2 -1 2 - -3 2 (2+-1)

1. Always do what's in parentheses

so we know that 1 is a negative and 2 is bigger than that number so you would just subtract normally.

2 2 -1 2 - -3 2 -1

Then get all exponents done.

4 -1 - 9-1

3-9-1

-6-1

Which should give u -5