Question

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

-185

-77

-23

85

Answer 1

3*3-2*5*2-3*3*3+-3*4

Answer 2

27-50-81+81 = -23

Answer 3

im assuming 3x3 and z4 is 3x^3 and z^4?

Answer 4

sub the values of x, y and z into the equation

(3)^3 - 2(5)^2 - 3(3)^3 + (-3)^4
= 27 - 2(25) -3(27) + 81
= 27 - 50 - 81 + 81
= -23