Answer :

So we have

x²+y³-z

Letting x=-2, y=9 and z=-9 we have

(-2)²+(9)³-(-9)

This gives us

4-729+9

Which gives us

4-720

Which gives us

-716

So the answer is -716. Hope this helps!!

Answer:

742

Step-by-step explanation:

x^2 + y^3 - z = (-2)^2 + 9^3 - (-9)

= 4 + 729 + 9

= 742