5×3x÷28

化简：2|x|-3x÷|2x-|5x||2|x|-3x÷|2x-|5x||(1)当x≥0原式=2x-3x÷(5x-2x)=2x-1(2)当xx>02x-1x2|x|-3x÷|2x-|5x||(1)当x≥0原式=2x-3x÷(5x-2x)=2

x(x-4)(x+4)-(x+3)(x²-6x+9)+5x³y²÷(x²y²)其中X=-3化简求值原式=x(x²-16)-(x³-6x²+9x+3x²

计算:(x^2-3x-28)/(x^2+5-6x)/(3x+12)/(x^3-10x^2+25x)(x-7)(x+4)/(x+6)(x-1)/3(x+4)/x(x-5)^2

x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2（x+5）/（x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2麻烦这位同学把括号标一下（x+5)/(x-1)=(-2x^2+38)/(x^2+4x

(求解、x+5)/(x-1)-(3x-3)/(x+5)=(8x+28)/(x^2+4x-5)-2(x+5)/(x-1)-(3x-3)/(x+5)=(8x+28)/(x^2+4x-5)-2(x+5)/(x-1)-(3x-3)/(x+5)-(8

(x^-3x+2/x^-5x+6)^2÷(x-1/x^2-2x-3)^2(x^-3x+2/x^-5x+6)^2÷(x-1/x^2-2x-3)^2=[(x-1)(x-2)/(x-2)(x-3)]^2÷[(x-1)/(x-3)(x+1)]^2=

化简：[(x+2)/(x^2-4)-(2x-5)/(x-4x+4)]÷[(x-3)/(x-2)]解原式=[(x+2)/(x-2)(x+2)-(2x-5)/(x-2)²]×(x-2)/(x-3)=[1/(x-2)-(2x-5)/(x

【【【急】】】分式计算x^2-x-6/x-3÷x-3/x^2-5x+6x^2-x-6/x-3÷x-3/x^2-5x+6原式=[(x²-x-6)/(x-3)]÷[(x-3)/(x²-5x+6)]={[(x+2)(x-3)]

3-x/2x-4÷（x+2-5/x-2)(1/x+1+1/x-1)÷x/x+11/x+1-x+3/x²-1·x²-2x+1/x²+4x+3（1/x-1/2)÷（1-x²+4/4x）(3-x)/(2x-

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

6-5x+x^2x-3x^2+5x+4--------÷----×----------------x^2-164-x4-x^2上传不了图-（6-5x+x^2）/（x^2-16）÷（x-3）/（4-x）×（x^2+5x+a）/（4-x^2）a

16-x^2/x^2-2x-3÷1^2-5x+4/x-316-x^2/x^2-2x-3÷1^2-5x+4/x-3=(16-x²)/(x-3)(x+1)×(x-3)/(x-1)(x-4)=-(x+4)/(x²-1)很高兴为

使代数式x+3/x-3÷x+5/x-4有意义的x的值分母不等于0所以x-3≠0(x+5)/(x-4)≠0x-4≠0所以x≠3且x≠-5且x≠4

x(x^2-1)+2x^2*(x+1）-3x*(2x-5)=x(3x^2-4x)-28x(x^2-1)+2x^2*(x+1）-3x*(2x-5)=x(3x^2-4x)-28;x^3-x+2x^3+2x^2-6x^2+15x=3x^3-4x^

8x^2-4x/x^2-x-6÷(x-3/x+2-x+2/x-3),其中x=5200-4/5=199.28x^2-4x/x^2-x-6÷(x-3/x...

(（x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x²-2x+8))²其x=-2,求值为多少?"/"是分数线原式化简：{（x-3)(x-2)/(x-3)(x-

计算：(1)/(x-3)÷(x+2)/(x^2-9)-(1)/(x^2+5x+6)1/(x-3)÷(x+2)/(x^2-9)-1/(x^2+5x+6)=1/(x-3)÷(x+2)/[(x-3)(x+3)]-1/(x+2)(x+3)=1/(x

化简：x^2-5x+6/x^2-1÷x-3/x+1原式=(x-2)(x-3)/(x+1)(x-1)*(x+1)/(x-3)=(x-2)/(x-1)

(16x^4-5x³+3x²-6x)÷(-2x)(16x^4-5x³+3x²-6x)÷(-2x)=16x^4÷(-2x)-5x³÷(-2x)+3x²÷(-2x)-6x÷(-2x)=

x÷2+x÷5=3,x=?点击看详细并不是因为所谓的比值定义为：点击看详细比例,期限一般规定技术图纸,指的是它的一种相应的数字图形元素的比例线性尺寸.中国①代表两个方程称为比例相同的比例,比如3：4=9：12,7：9=21：27,点击看详细