What is the sum of the polynomials? (8x2-9y2-4x) + (x2-3y2-7x)

The sum of the polynomials (8x²-9y²-4x) + (x²-3y² - 7x) is:

1. You must add the terms whose variables and exponents are the same.

2. Let's rewrite the polynomials:

(8x²-9y²-4x) + (x²-3y²-7x)

8x²-9y²-4x+x²-3y²-7x

(8+1) x² + (-4-7) x + (-9-3) y²

3. Therefore, the result is:

9x²-11x-12y²

3. What is the sum of the polynomials?

The answer is: 9x²-11x-12y²