若X-Y=5,-XY=3求(7X+4Y+XY)-6(5/6y+x-xy)d的值
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若X-Y=5,-XY=3求(7X+4Y+XY)-6(5/6y+x-xy)d的值
若X-Y=5,-XY=3求(7X+4Y+XY)-6(5/6y+x-xy)d的值
若X-Y=5,-XY=3求(7X+4Y+XY)-6(5/6y+x-xy)d的值
(7X+4Y+XY)-6(5/6y+x-xy)
=7x+4y+xy-5y-6y-6xy
=2x-2y-5xy
=2(x-y)-5xy
=10+15
=25
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求(3x^+y^-5xy)-【2x^-(-4xy-y^+7x^)】=?
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若X-Y=5,-XY=3求(7X+4Y+XY)-6(5/6y+x-xy)d的值
若x-y=5,-xy=3,求(7x+4y+xy)-6(5/6y+x-xy)的值,