4x^2-12x+9=25

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 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 5x+9x=6x*2+12 x+9-x/3=4 解下列方程：1、4X平方+12X+9=81 2、2X平方+3X=3 3、X平方-2X+1=25 4、X（2X-5）=4X 解方程5X+35=140-2X 9X-27=70+4X 12+7X=2X+32 250/X+25=75 23X-72X+ 如果3x^3-x=1,求9x^4+12x^3-3x^2-7x+1 解方程（x^2+3x)/(2x^2+2X-8)+(x^2+x-4)/(3x^2+9X)=11/12 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 用适当方法解方程（x+6)²-9=0 x²-2x+1=25 4x²+12x+9=81 3x 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), (4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)