3x+2y+5x+6y+9x+8y 可以合并成(3x+5X+9x)+(2y+6y+8y)吗
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
合并多项式:5(x-y)²-(x-y)-8(x-y)²-3(x-y)
3(x-y)-2(x+y)-5(x-y)+4(x+y)+3(x-y) 化简合并同类项
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
5x+6y+3x-4y+3-x+x =5x+3x-x+x+6y-4y+3 =8x=2y+3 谁能告诉我这题合并同类项的解
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
合并同类项:-3x+2y-5x-7y
3x+2y-5(x+y)合并同类项
3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算