3² = -1*3² = -1 * 9 = -9 (order of operations) while (-3)² = (-) = +9 or 9

evaluate: z2 – x2 -xy if x = -2, y = 3, and z = -4 ( see section 1.8 for further review)

For the given values

Step-by-step explanation:

Here, the given values are:

X = -2, Y = 3 and Z = -4

To find the value of the expression:

Now, substitute the given values in the expression, we get

or,

Hence, for the given values the simplified value is 18.

b is the correct answer