x²+7x+10 x²-2x-8 y²-7y+12 x²+7x-18(1)x²+7x+10 (2) x²-2x-8 (3)y²-7y+12 (4)x²+7x-18

问题描述:

x²+7x+10 x²-2x-8 y²-7y+12 x²+7x-18
(1)x²+7x+10 (2) x²-2x-8 (3)y²-7y+12 (4)x²+7x-18

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