Question

Perform the operation(-7x^2-4)+(-7x^2-6x-2)

Answer 1

Given the following expression:

`(-7x^2-4)+(-7^{}x^2-6x-2)`

since we dont have any sign on the left of the first summand and there is a plus sign next to the second summand, we can write all the terms without the parenthesis:

`(-7x^2-4)+(-7x^2-6x-2)=-7x^2-4-7x^2-6x-2`

then, notice that we only have as similar terms -7x^2, then, we can simplify:

`-7x^2-4-7x^2-6x-2=-14x^2-6x-6`

therefore, the final result is -14x^2-6x-6