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Mathematics, 17.06.2021 18:50 gia57

If A= x^2 -9x + 6 and B= 7x^2 -3x -3, what is A+B? A-B?

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If A= x^2 -9x + 6 and B= 7x^2 -3x -3, what is A+B? A-B?...
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