4x²+2x-9y²+3y,x²+6y-y²-9,x²-xy-2y
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/08 14:42:09
4x²+2x-9y²+3y,x²+6y-y²-9,x²-xy-2y²-x-y,x²-y²-x-y
2m(a-c)-5(c-a) ,3a(x-y)²-2(y-x)²
2m(a-c)-5(c-a) ,3a(x-y)²-2(y-x)²
4x²+2x-9y²+3y
=(4x²-9y²)+(2x+3y)
=(2x+3y)(2x-3y)+(2x+3y)
=(2x+3y)(2x-3y+1)
x²+6y-y²-9
=x²-(y-3)²
=(x+y-3)(x-y+3)
x²-xy-2y²-x-y,
=(x+y)(x-2y)-(x+y)
=(x+y)(x-2y-1)
x²-y²-x-y
=(x+y)(x-y)-(x+y)
=(x+y)(x-y-1)
2m(a-c)-5(c-a)
=2m(a-c)+5(a-c)
=(a-c)(2m+5)
3a(x-y)²-2(y-x)²
=3a(x-y)²-2(x-y)²
=(3a-2)(x-y)²
=(4x²-9y²)+(2x+3y)
=(2x+3y)(2x-3y)+(2x+3y)
=(2x+3y)(2x-3y+1)
x²+6y-y²-9
=x²-(y-3)²
=(x+y-3)(x-y+3)
x²-xy-2y²-x-y,
=(x+y)(x-2y)-(x+y)
=(x+y)(x-2y-1)
x²-y²-x-y
=(x+y)(x-y)-(x+y)
=(x+y)(x-y-1)
2m(a-c)-5(c-a)
=2m(a-c)+5(a-c)
=(a-c)(2m+5)
3a(x-y)²-2(y-x)²
=3a(x-y)²-2(x-y)²
=(3a-2)(x-y)²
4x²+2x-9y²+3y,x²+6y-y²-9,x²-xy-2y
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
(-x-2y)(x²-2xy+4y²)
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
已知:x²-6xy+9y²=0,求代数式3x+5y/4x²-y²×(2x+y)的
原式=[(2x-y)-3]²=(2x-y)²-6(2x-y)+9=4x²-4xy+y
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
初二数学通分问题2x+6y/x—3y和x/x—9y²和1/x²6xy+9y²
求通分 2x+6y/x-3y,x/x-9y²,1/x²-6xy+9y²
x²/xy-x/y