algebraic expressions:-
3x²+12+9x-20+6x²-x
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3x2+6x2+9x-x+12-20
9x2+8x-8
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Answer:
= 3x² + 12 + 9x - 20 + 6x² - x
= 3x² - 8 + 9x + 6x² - x
= 3x² - 8 + 9x + 6x² - x
= 9x² - 8 + 9x - x
= 9x² - 8 + 8x
= 9x² + 8x - 8
= 9x² + 8x - 8
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