6x^2·3xy
3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程
6x^2·3xy
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程
-3(2x^2-xy)+4(x^2+xy-6)
4(x²+xy-6)-3(2x²-xy)
-3(2x²-xy)+4(x²+xy-6)
3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x)
因式分解3x^2-6xy+x
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x,
x^2-xy-6y^2+3xy+y+2
( )*3xy=6x^2y+2xy^2
因式分解:3x^2+6xy^2-12xy
(9x^2y-6xy^2)/3xy
已知1/x-1/y=2,求3x+7xy-3y/2x-3xy-2y答案是1/x-1/y=2(y-x)/xy=2 得:x-y=-2xy(3x+7xy-3y)/(2x-3xy-2y)=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy)=xy/(-7xy)=-1/7 谁能帮我解释一下=[3(x-y)+7xy]/[2(x-y)-3xy]=(-6xy+7xy)/(-4xy-3xy) 是怎
-2x^2y(-2xy^2)^2+(2xy)^3X(xy^2)说错说错,3xy【2xy-x(y-2)+x】(x+2)(x+3)-(x+6)(x-1)(3/2x^2+xy-3/5y^2)·(-4/3x^2 y^2)
3xy(x的平方y-xy的平方+xy)-xy的平方(2x的平方-6xy+2x)