Question

Evaluate the following expression using the values given:

Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3.

Answer 1

x3 − 2y2 − 3x3 + z4
∴ (3x3) − {(2x5)x2} − 3x3 + (-3x4)
∴ 9− 20 − 9 -12
∴ -32