难忘的那句话400字

求3x的平方-6x+5与4x的平方-7x-6的和 计算(6x^2-4x)/(3x-2) 分解因式:3x^4+7x^3-6x^2-3x+2 1.如果6X=42,那么1.3X+2.7X的值是多少? 如果6x=42,那么1.3x+2.7x的值是多少? 先化简再求值3x³-[x³+（6x²-7x）]-2（x³-3x²-4x),其中x=-1 化简：3x²-【7x-（4x-3）-3x²】 若方程3x-4=4x+3和方程2(x+1)—m=-2(m-2)的解相同,则m等于多少? 用配方法解方程3x平方-x-6=0 用配方法解方程3x的平方+x-9=0 解方程:3x的平方+x+2=0 用配方法 用配方法解方程 (1)1/3x-x-4=0 (2)6x^2-x-1=0 (3)x^2+7/4x+1/2=0 利用换元法解分式方程2x-1/x + x/2x-1=2 用换元法解分式方程(x-2/x)^2-2x+4/x=-1 用换元法解分式方程(2x-1)+x/(2x-1)=2 用换元法解分式方程x^2-2x+7/x^2-2x=8jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj 用换元法解分式方程x-1/x-3x/x-1+1=0时,如果设x-1/x=y,将原方程化为关于y的整式方程,那么这个整式方程为 解分式方程 5/(x^2+3x)-1/(x^2-x)=0 若分式方程3X/X+1=m/x+1+2有增根,则x的值为? m为何值时,分式方程2X-3/X-6=M/X-6又增根 若关于x分式方程1/x-2+k/x+2=3/x²-4有增根,求k的值 若x/x^2-3x+1=2,求分式x^2/x^4+x^2+1的值本题用常规法无法解答,要用倒数带入. 若分式x^2+x/x^2+3x+2的值为0,求1/(x-1)^2 已知x^2-3x+1=0,求分式x^2/（x^4+3x^2+1）的值在解x时,最好用十字乘法,最好要用具体过程, 已知分式3x+4/x^2-x-2=A/x-2+B/x+1,其中A,B是常数,求4A+B的值 3x=100+x 3x=x+100 谁告诉我x+3x=100 3x=x+100 x=? x(1-3x)=100怎么解,急用, 1/3x-3/10(100-x)=9 怎么解 1/3x+3(100-x)=100怎么解