12x

如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1 x的平方-5x+12x (2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x x：12 (x+12)*(x+12)=x*x+360怎么解 (x+x)-8(x+x)＋12因式分解,急 X/15 + X/12 + X/10 = 1365,求X, |x+11|+|x-12|+|x+13|+|x-13|的最小值 x/2+x/8+x/12+x/20=1 (x²-7x+12)(x²+x+1)>0,