(7x²-4x+3)-(5x²+2x-12)+2x²-4x+3
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Answer:
4x² - 10x + 19
Step-by-step explanation:
( 7x² - 4x + 3 ) - ( 5x² + 2x - 12 ) + 2x² - 4x + 3
= 7x² - 4x + 3 - 5x² - 2x + 12 + 2x² - 4x + 3
= 7x² - 5x² + 2x² - 4x - 2x - 4x + 3 + 12 + 3
= 4x² - 10x + 19
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