6x+7y-6y-5xy+3xy-3x 其中x=3,y=2.(化简后求值)
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6x+7y-6y-5xy+3xy-3x其中x=3,y=2.(化简后求值)6x+7y-6y-5xy+3xy-3x其中x=3,y=2.(化简后求值)6x+7y-6y-5xy+3xy-3x其中x=3,y=2
6x+7y-6y-5xy+3xy-3x 其中x=3,y=2.(化简后求值)
6x+7y-6y-5xy+3xy-3x 其中x=3,y=2.(化简后求值)
6x+7y-6y-5xy+3xy-3x 其中x=3,y=2.(化简后求值)
6x+7y-6y-5xy+3xy-3x
=(6-3)x+(3-5)xy+(7-6)y
=3x-2xy+y
把x=3,y=2代入:
原式
=3×3-2×3×2+2
=9-12+2
=-1
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
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