(1) -3X^-2XY-8XY-(-5Y^2)-2X^2-Y^2
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(1) -3X^-2XY-8XY-(-5Y^2)-2X^2-Y^2
(2) 3(-2+3X-X^2)-(4-3X+X^2)
(3) 3X^2-{5X-2(2X-3)}
(4) (2X^2-1/2+3x)-4(X-X^2+1/2)
要具体过程、不要错误答案、这里没有乘法、只有加减、^2代表2的平方、麻烦速度、谢谢
(2) 3(-2+3X-X^2)-(4-3X+X^2)
(3) 3X^2-{5X-2(2X-3)}
(4) (2X^2-1/2+3x)-4(X-X^2+1/2)
要具体过程、不要错误答案、这里没有乘法、只有加减、^2代表2的平方、麻烦速度、谢谢
(1) -3X^-2XY-8XY-(-5Y^2)-2X^2-Y^2
=-3x^2-2xy-8xy+5y^2-2x^2-y^2
=-5x^2-10xy+4y^2
(2) 3(-2+3X-X^2)-(4-3X+X^2)
=-6+9x-3x^2-4+3x-x^2
=-4x^2+12x-10
(3) 3X^2-{5X-2(2X-3)}
=3x^2-5x+4x-6
=3x^2-x-6
(4) (2X^2-1/2+3x)-4(X-X^2+1/2)
=2x^2-1/2+3x-4x+4x^2-2
=6x^2-x-5/2
=-3x^2-2xy-8xy+5y^2-2x^2-y^2
=-5x^2-10xy+4y^2
(2) 3(-2+3X-X^2)-(4-3X+X^2)
=-6+9x-3x^2-4+3x-x^2
=-4x^2+12x-10
(3) 3X^2-{5X-2(2X-3)}
=3x^2-5x+4x-6
=3x^2-x-6
(4) (2X^2-1/2+3x)-4(X-X^2+1/2)
=2x^2-1/2+3x-4x+4x^2-2
=6x^2-x-5/2
(1) -3X^-2XY-8XY-(-5Y^2)-2X^2-Y^2
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
5x^2y/-1/2xy*3xy^2
(xy-x^2)乘以(xy)/(x-y)
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
(x+y-2xy)(x+y-2)+(1-xy)²
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2