(15.5-x)÷6＝(16.5-x)÷10这个方程怎么解-搜答案-神马作文网

原式=(x-3)^2)*[(x+3)/(x-3)(x-6)]=(x+3)(x-3)/(x-6)=(x^2-9)/(x-6)

原式=[(2x-6)/(x^2-4x+4)]/(x+3)*(x^2+x-6)/(3-x)=[2(x-3)/(x-2)^2]/(x+3)*(x+3)(x-2)/(3-x)=-2/(x-2)

(x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1)(x-4/

x^2+3x-2＝0,x(x+3)=2,∴(2x-4)╱(x^2+6x+9)÷（x-3）×(x^2-9)╱(2x-x^2)=2(x-2)/(x+3)^*1/(x-3)*(x+3)(x-3)/[x(2-

A={x|x^2-2x-3<3(1-x)}={x|x^2+x-6<0}={x|-3<x<2}B={x|9-x^2>6-2x}={x|x^2-2x-3<0}={x|-

(x^2-6x+9)÷x^2-9x+18/x+3=(x-3)^2÷(x+3)(x-3)+18/(x+3)=(x-3)/(x+3)+18/(x+3)=(x+15)/(x+3)

x²+2x／x²-6x+9÷x²-4／x²-3x=x(x+2)/(x-3)^2*x（x-3）/（x+2)(x-2)=x^2/[(x-3)(x-2)]

=18x+0.5x=18.5x

注意：本题x=2时题目没意义,应该舍去（这是很多学生错误所在）这里x只能取根号2-1

(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)=2（x-3)/(x-2)^2X(x+3)^2/(3-x)X(2-x)/(x+3)=2（x-

（x²-6x+9）÷x+3分之x²-9x+18,=（x²-6x+9）×（x+3)/（x²-9x+18）=（x-3)²(x+3)/[(x-3)(x-6)

原式=2x(x-2)/(x+2)×x(x+2)/(x-2)²×3(x-2)/x=6x当x=√3/2时原式=3√3

1.(x^3-3x^2)/(x^2+5x+6)÷(x^3-9x)/(x^2+2x-3)*(x+2)/(2x)=x^2(x-3)/(x+2)(x+3)*(x+3)(x-1)/x(x+3)(x-3)*(x

解1：原式=x(x-1)/(x+1)*(x+1)/x=x-1解2：原式=(x+3)^2/(x+3)(x-3)*(x-3)/(x+2)=(x+3)/(x-3)*(x-3)/(x+2)=(x+3)/(x+

原式化简：{（x-3)(x-2)/(x-3)(x-4)}²÷{(x+1)(x+2)/(x-4)(x+2)}²{(x-2)/(x-4)}²÷{(x+1)/(x-4)}

χ=0.7×3=2.1χ=2.8×6=16.8χ=7.5-1.5=6χ=7.1+4.2=11.3

①x²-4／x²-4x+3÷x²+3x+2／x²-x=(x²-4)/(x²-4x+3)÷(x²+3x+2)/(x²-x)

题目都写不清楚.x=0

x÷6＋x÷9＝5

分式计算：[(x²+2x)／(x²-6x+9)]÷[(x²-4)／(x²-3x)]原式=[x(x+2)/(x-3)²]•[x(x-3)/(