Question

I need help again please

Answer 1

-96

Explanation:

We can evaluation the expressions for s = -4 and t = 5 by substituting -4 for s and 5 for t in st^2 - s:

(-4)(5)^2 - (-4)

(-4)(25) + 4

-100 + 4

-96

Thus, st^2 - s = -96 when s = -4 and t = 5.