⑴:(3x+1)²=7 ⑵:9x²-24x+16=11
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程(x²+3x+2)(x²-2x-1)(x²-7x+12)+24=0
(x+1)(x+2)(x+3)x+1=0则3x²+9x+7
已知x²-3=0,求代数式x(x+1)²-x(x²+x)-x-9的值
用公式法解① x(2x-5)=4x-10②x²+5x+7=3x+11③1-8x+16x²=2-8x
解方程 (3x+1)(3x-1)=(x+2)(9x-4) 2(x-3)(x-2)-(x+3)²=(x-1)(x
(x+1)(2x-3)-(x-1)(x+2)=x²+7,解方程,
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
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),
x+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0