3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
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3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=23x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=23x^2y^2-[5xy^2
3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
3x^2y^2--[5xy^2--(4xy^2--3)+2x^2y^2]
=3x^2y^2--[5xy^2--4xy^2+3+2x^2y^2]
=3x^2y^2--5xy^2+4xy^2--3--2x^2y^2
=x^2y^2--xy^2--3
=xy^2(x--1)--3
当 x=--3,y=2 时,
原式的值=(-3)X2^2X(--3--1)--3
=(--3)X4X(--4)--3
=48--3
=45.
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
计算:5xy^2-[3xy^2-(4xy^2-2x^2y)]+2x^2y-xy^2
5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2求
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-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
2x²y-3(2xy-xy)-xy
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(-3x^y+2xy)-( )=4x^+xy
3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
3x^2y^2-[5xy^2-(4xy^2-3)+2x^2y^2,其中x=-3,y=2
(-3xy+2xy)-(4xy+xy)
5xy²-{2x²y-[3xy²-(4xy²-2xy²)]}=