-3[y-(3x-3xy)]-[y+2(4x^2-4xy)]
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-3[y-(3x-3xy)]-[y+2(4x^2-4xy)]
-3[y-(3x-3xy)]-[y+2(4x^2-4xy)]
-3[y-(3x-3xy)]-[y+2(4x^2-4xy)]
-3[y-(3x-3xy)]-[y+2(4x^2-4xy)]
=-3y+3(3x-3xy)-y-2(4x^2-4xy)
=-4y+9x-9xy-8x^2+8xy
=-8x^2-4y+9x-xy
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-x-3xy+y
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x^2-xy-6y^2+3xy+y+2
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2x²y-3(2xy-xy)-xy
x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
【x(xy-xy)-y(x-xy)】÷3xy
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
(x^2y-9y)/(xy+3y)
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
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(xy^2-2xy+x)*y^3-y分之y^3+y^2
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-xy^2(x+y)^3+x(x+y)^2因式分解
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