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I need help on this homework
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I need help on this homework

I need help on this homework-example-1
User Bruce Aldridge
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(-9x²-2x) - (-9x²-3x) = (-9x²-2x) +(9x²+3x) = -9x²-2x+9x²+3x = (-9x²+9x²)+(-2x+3x) = x
User Royland
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