(6x²-7x-5)-( )=5x²-2x+3
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
2x+3x+4x+5x+x+6x+7x=100
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根
(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½