若|3/2-6|+(0.2+2Y)2;=0,则X2;+Y2;=?2是平方

(y^2)^4y-(-2y)^3y^6= 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 y (3y^2+8y-3)-6y(3y+2y-1)+9y 2y+5/3y-6-y/2=5y-4/2y-4 -2y(y-3)=-3(6-2)y -2y(y-3)=-3(6-2)y -2y(y-3)=-3(6-2)y 3Y-2=Y+1+6Y 3y+2=y-1+6y 不要分数 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= (y+3)²=2y+6 3y+2=1+6y 3y+2=1+6y 若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值 通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) y(y-2)²-y(y+3)(y-5) y=1/2 化简求值 y(y-2)²-y(y+3)(y-5) y=1/2 化简求值