(2X-3Y-2XY)-(X-4Y+7XY),其中X+Y=5,XY=-3 要有具体的计算过程!
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(2X-3Y-2XY)-(X-4Y+7XY),其中X+Y=5,XY=-3 要有具体的计算过程!
(2X-3Y-2XY)-(X-4Y+7XY),其中X+Y=5,XY=-3 要有具体的计算过程!
(2X-3Y-2XY)-(X-4Y+7XY),其中X+Y=5,XY=-3 要有具体的计算过程!
(2X-3Y-2XY)-(X-4Y+7XY),
=2x-3y-2xy-x+4y-7xy
=x+y-9xy
=5-9*(-3)
=32
(2X-3Y-2XY)-(X-4Y+7XY)=X+Y-9XY=5-9x(-3)=32
(2X-3Y-2XY)-(X-4Y+7XY),
=X+Y-9XY
=5-9×(-3)
=32
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