add:11x²-8x+4 and 6x²+7x-10
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5
11x²-8x+4+6x²+7x-10
17x²-x-6
17x²-x-6
pink94:
tq
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12
11x²-8x+4 + 6x²+7x-10
11x²+ 6x²-8x+7x+4-10
(11+6)x²+(-8+7)x-6
17x²-x-6
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