Question

If `A=4x^2-3x+8` and `B=-2x^2-4x+7`, what is `A-B`?

Answer 1

`A-B` is `6x^2+x+1`

Explanation:

`A=4x^2−3x+8`
`B=-2x^2-4x+7`

Substitute for A and B into A-B

`(4x^2−3x+8)-(-2x^2-4x+7)`

`=4x^2-3x+8+2x^2+4x-7`

`=4x^2+2x^2-3x+4x+8-7`

`=6x^2+x+1`#