(2x+y+1)(2x+y-10)怎么做
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(2x+y+1)(2x+y-10)怎么做(2x+y+1)(2x+y-10)怎么做(2x+y+1)(2x+y-10)怎么做=4X^2+2xy-20x+2xy+Y^2-10y+2x+y-10=4X^2+y
(2x+y+1)(2x+y-10)怎么做
(2x+y+1)(2x+y-10)怎么做
(2x+y+1)(2x+y-10)怎么做
=4X^2+2xy-20x+2xy+Y^2-10y+2x+y-10
=4X^2+y^2+4xy-18x-9y-10
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