Answer:
2x² + 9x - 9
Solution:
(3x² + 4x - 2) - (x² - 5x + 7)
= 3x² + 4x - 2 - x² - 5x + 7
= 3x² - x² + 4x + 5x + -2 – 7
= 2x² + 9x - 9
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