Sum = -8x² - x + 5
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
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