Question

14. If x = 1, y = -1, z = 3, find the value of 2x2 + y2 – 3z3 .​

Answer 1

Answer:

given

x=1, y=-1, z=3

2(x)^2 +(y)^2 - 3(z)^3

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

= 2+1-81

= 78