(x+5)²-(x-2)(x-3) =x²+10x+25-(x²-5x+6) *5x怎么来
(x+5)²-(x-2)(x-3) =x²+10x+25-(x²-5x+6) *5x怎么来
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
代数式6x+2x²-3x+x²+1,其中x=-5
(x+3)² -x(x-5) 其中X=-½
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),