Question

Subtract -2k3 + k2 - 9 from 5k3 - 3k + 7. 3k3 + k2 - 3k - 2 -7k3 + k2 + 3k - 16 7k3 - k2 - 3k + 16

Answer 1

It’s probably wrong but I got -7-2k7

Answer 2

Answer: Third option is correct.

Step-by-step explanation:

Since we have given that

Subtract $-2k^3 + k^2 - 9$ from $5k^3 - 3k + 7$

We need to find the value after subtraction:

We will write  $5k^3 - 3k + 7$ then , it will subtract it with  $-2k^3 + k^2 - 9$

So, it becomes,

$5k^3-3k+7-(-2k^3+k^2-9)\\\\=5k^3-3k+7+2k^3-k^2+9\\\\=7k^3-k^2-3k+16$

Hence, Third option is correct.