(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
通分:(1)3分之x与6分之1-x与x+5分之x的平方-x (2)3y的平方分之(x-y)(x-2)和3xy分之(x-y
计算(1)3x/8y×16y²/27x² (2)(2xy-x²)÷x-2y/xy 2x-6
(5)(-2x²)×(-y)+3xy×(1-3分之1x);(6)(-6x²)²+(-3x)
几道数学题:x-x^2分之x^2-1×1-y分之xy-x,(xy-x^2)÷xy分之x-y,x^2+x分之x-3÷(x^
1.已知x+y=-4,xy=3,求5(2分之1xy+2y)+[6x-(2xy+y-3x)]的值
(3x²y-xy²)-3(x²y-2xy²) x=2分之1 y=3分之1
(1)-2分之1xy(3y²-2xy+3x²y)
化简求值[1-(2x/x+y)]÷ (x²-2xy+y²/3x+3y)+(x²+xy/x&
计算3x/8y×16y²/27x² (2xy-x²)÷x-2y/xy 2x-6/x
(1).设A=2X²-3Xy+y²+X-3y,B=4X²-6xy+2y²+4X-
-2分之1(4xy-8x²)+3分之1(xy-6x²y²)化简.刚刚那题谢谢你了.