Question

Which of the following expressions is equivalent to 4(2k + 7) – 5k(6k-2) ?

A 30k2 + 2k + 28
B. -30k2 – 2k + 28
C. 30k2 + 18k + 28
D. -30k2 + 18k + 28

(the 2s next to the 30s mean to the second power)

Answer 1

Answer: D

Step-by-step explanation:

`4(2k + 7)-5k(6k-2)`

`8k+28-30k^(2)+10k`

`-30k^(2)+18k+28`

Answer 2

D

Explanation:

4(2k+7)-5k(6k-2)=

8k+28-30k2+10k

-30k2+18k+28