Answer:
Note: Any number or variable(unknown) raised to the index or power zero (0)* is equal to one (1)*.
3. Solution
Given: x = 2 and y = 5
-4x^-2 + 3y^0
by substituting the values of x and y,
> -4(2)^-2 + 3(5)^0
> -4/(2)^2 + 3(5)^0
> -4/4 + 3(1)*
> -1 + 3 = 2
4. Solution
Given: x = 2 and y = 5
2x^0y^-2
by substituting the values of x and y
> 2(2)^0(5)^-2
>2(2)^0×1/(5)^2
>2(1)×1/25
>2×1/25
>2/25