From the sum of 3x² - 5x + 2 and - 5x² - 8x + 9 subtract
4x² - 7x + 9.
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- 6x^2 - 6x -2
Step-by-step explanation:
(3x² - 5x + 2) + (- 5x² - 8x + 9 ) = -2x^2-13x+11
-2x^2-13x+11 ( 4x² - 7x + 9 ) = - 6x^2 - 6x -2
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