Question

How do you simplify `x+ 2x - 9+ x ^ { 2} - 2- 3x + 2x ^ { 2} - 4- 3x`?

Answer 1

Simplified: `3x^2-3x-15`

Factored: `3(x^2-x-5)`.

Explanation:

The easiest thing to do here is put terms with similar powers together.

`2x^2+x^2-3x-3x+2x+x-4-2-9`

Simplify.
`3x^2-3x-15`

After that, if you wish to factorise you can factor out the `3`.
`3(x^2-x-5)`

And then you're done!