Question

if x = –2, y = 2 and z = –1, find the value of x2 + y3 – 2xyz.

Answer 1

Answer:

Step-by-step explanation:

x = -2,  y = 2,  z = -1

Putting the values in the equation we get

x2 + y3 - 2xyz

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

= -4 + 6 - 8

= -4 - 2

= -6