(2xy-3)(2xy+3)+(xy+3)^2化简求值 x=1/5 y=-2
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(2xy-3)(2xy+3)+(xy+3)^2化简求值x=1/5y=-2(2xy-3)(2xy+3)+(xy+3)^2化简求值x=1/5y=-2(2xy-3)(2xy+3)+(xy+3)^2化简求值x
(2xy-3)(2xy+3)+(xy+3)^2化简求值 x=1/5 y=-2
(2xy-3)(2xy+3)+(xy+3)^2化简求值 x=1/5 y=-2
(2xy-3)(2xy+3)+(xy+3)^2化简求值 x=1/5 y=-2
x=1/5 , y=-2
xy=-2/5
(2xy-3)(2xy+3)+(xy+3)^2
=(2xy)²-9+(xy)²+6xy+9
=5(xy)²+6xy
=xy(5xy+6)
=(-2/5)[5(-2/5)+6]
=(-2/5)[-2+6]
=(-2/5)[4]
=-8/5
(-3xy+2xy)-(4xy+xy)
3xy-3xy-xy+2yx
3xy-4xy-(-2xy)
3xy-4xy-(-2xy)
2xy.(-3xy)÷(xy)
2xy-xy-(-3xy)=
[(2xy-3)(2xy+3)+(xy+3)^2]/(-xy)
xy-3xy+2xy-xy
3xy^2*(-2xy)
xy×(xy)²-3xy
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
3(xy-xy)-2(xy+xy)+3xy
(-4xy^3)×(-xy)+(-3xy^2)^2
(-3xy^2)^2+(-4xy^3)*(-xy)=多少
(-4xy^3)*(-xy)+(-3xy^2)^2
(3xy^2)^2+(-xy^3)(4xy)
1/2xy(2/3xy²-2xy)
3(xy-z)^2-(2xy+z)(-z+2xy)