Question

Find 2r2 + 3s3 − r2 + 4t2 − r2 if r = −2, s = −3, and t = 5.

Answer 1

19

Explanation:

Honestly, it took my 45 whole minutes to figure this out and A lot of steps, so just trust me on this one and if you want an expantation I will put one in for you, k? :)

Answer 2

2 x -2 x 2 = -8
+ 3 x -3 x 3 = -9
- (-2) x 2 = -4
+ 4 x 5 x 2 = 40
- (-2) x 2 = -4

So then -8 + (-9) - (-4) + 40 - (-4) = 31

Glad I can help :)