Question

Subtract (2x3 + 9x − 8) − (4x2 − 15x + 7).

Answer 1

`2x^(3)-4x^(2)+24x-15`

Explanation:

we have

`(2x^(3)+9x-8)-(4x^(2)-15x+7)`

step 1

Eliminate the parenthesis

`2x^(3)+9x-8-4x^(2)+15x-7`

step 2

group terms that contain the same variable

`2x^(3)-4x^(2)+(9x+15x)+(-8-7)`

step 3

Combine like terms

`2x^(3)-4x^(2)+24x-15`