Answer:
The answer for this question is - 9x² + 12x - 9.
Step-by-step explanation:
( - 6x² + 7x - 9 ) + ( - 3x² + 5x )
= - 6x² + 7x - 9 - 3x² + 5x
= - 6x² - 3x² + 7x + 5x - 9
= - 9x² + 12x - 9 ans....
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