Question

How do you add `(3x ^ { 2} - 5x - 5) + ( 9x ^ { 2} + 2x + 1)`?

Answer 1

Simplifying this expressions give us `12x^2-3x-4`

Explanation:

SO we can start adding like terms because if the plus sign between these trinomial (three terms in an expressions) algebraic expressions were to be replaced by a negative, we would then need to distribute the negative sign on the right side before starting to simplify further but, we don't need to.

So add the like term like this:
`3x^2+9x^2=12x^2`
`-5x+2x=-3x`
`-5+1=-4`

Now, you put it in standard form of highest degree to lowest degree.

`12x^2-3x-4`