Respuesta :

Answer:

Sum = -8x² - x + 5

Explanations:

The given equations are:

-3x² - 7x + 9

and -5x² + 6x - 4

The sum of the two equations is:

Sum = (-3x² - 7x + 9) + (-5x² + 6x - 4)

Sum = -3x² - 5x² - 7x + 6x + 9 - 4

Sum = -8x² - x + 5