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9x^2 -7 \\-4x^(2) -20x+25
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9x^2 -7 \\-4x^(2) -20x+25

User Alexander Goncharov
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So you would do 9x^2- 4x^2= 5x^2 the 20x would stay the same because nothing else has a single x at the end then you would do -7 + 25= 18 so it would be 5x^2- 20x+18
User Yohana
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