Question

If r = -10, then find the value of r³-5(r-5).

Answer 1

Answer:-1025

Step-by-step explanation:see the image

Answer 2

Answer:

$given \\ \: \: \: \: \: \: \: \: \: r = - 10 \\ therefore \\ = {r}^{3} - 5(r - 5) \\ = {( - 10)}^{3} - 5( - 10 - 5) \\ = - 1000 + 75 \\ = - 925$