x除以更号下2-3x平方

(8x+9)/(x^2+x-6)=a/(x+3)+b/(x-2)8x+9=a(x-2)+b(x+3)8x+9=(a+b)x+(3b-2a)建立方程组a+b=83b-2a=9得到解a=3b=5

(1-x)^2/(x^2+4x+4)/(x-1)^2*(x^2+3x+2)/(x-1)=(x+1)/(x+2)(x-1)=(x+1)/(x^2+x-2)再问：是1-x的平方，不是（1-x）的平方再答：

原式=[2(x-3)/(x-2)²]÷(x+3)×(x+3)(x-2)/[-(x-3)]=-2(x-3)(x+3)(x-2)/[(x-2)²(x+3)(x-3)]=-2/(x-2)

((x+2)/(x^2-2x)-(x-1)/(x^2-4x+4))/((x^2-16)/(x^2+4x))=((x+2)(x-2)-(x-1)x)/((x-2)^2*x)/((x-4)/x)=((x-

原式=[(x²+2x)/(x²+4x+4)]÷[(2x²-8)/(3x+6)]÷[1/(x²-4)]=[x(x+2)/(x+2)²]÷{2(x+2)(

(2x-6)/(X平方-4x+4)×(2x-4)/(x-3)=4(x-3)(x-2)/(x-2)平方(x-3)=4/(x-2)如果不懂,请追问,祝学习愉快!

格式有点乱,〖((1-x)/(3-x))^2/((x^2-6x+9)/(9-x^2 ))〗^ ×1/(x^2-2x+1)=〖((1-x)/(3-x))^2/(〖(X-3)〗^2/(

4x三次除以(-2x)平方-(2x平方-x)除以(1/2x)=4x^3/4x^2-(2x^2-x)/(1/2x)=x-2x(2x-1)/x=x-2(2x-1)=x-4x+2=-3x+2

(2x-6)除以(X平方-4x+4)除以(x+3)乘以(x平方+x-6)除以(12-4x)=2(x-3)/(x-2)^2/(x+3)*(x+3)(x-2)/4(3-x)=-2(x-3)/[(x-2)^

1除以(x的平方+3x+2)+1除以(x平方+5x+6)+1除以(x平方+7x+12)=1/（x+1）（x+2）+1/(x+2)(x+3)+1/(x+3)(x+4)=1/(x+1)-1/(x+2)+1

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

2x/5x-3除以3/25x平方-9*x/5x+3=[2x/(5x-3)]÷[3/(25x^2-9)]×[x/(5x+3)]=[2x/(5x-3)]÷[3/(5x+3)(5x-3)]×[x/(5x+3

题目是（5x+2)/(x²+x)=3/(x+1)这样吧?∵（x+1）作分母,不为0,可直接约分∴（5x+2)/x=3∴5x+2=3x∴2x=-2∴x=-1

4-4x+x^2分之2x-6除以（x+3)乘以3-x分之x^2+x-6=2(x-3)/(x-2)×1/(x+3)×(x+3)(x-2)/(3-x)=-2/(x-2)

x平方-4x+4分之2x-6除以(x+3)=(2x-6)/(x²-4x+4)÷(x+3)=2(x-3)/(x-2)²×1/(x+3)=2(x-3)/(x+3)(x-2)²

先说答案x1=2x2=1/22(x*2+1/x*2)-3(x+1/x)-1=02(x+1/x)*2-4-3(x+1/x)-1=0(x+1/x)*2-3/2(x+1/x)-5/2=0(x+1/x-3/4

y=(3x²+2x+2)/(x²+x+1)yx²+yx+y=3x²+2x+2(y-3)x²+(y-2)x+(y-2)=0x是实数,所以判别式大于等于0

(4x²-x³-2x)÷2x-(x-1)²=[2x(2x-x²/2-2)]÷2x-(x²-2x+1)=(2x-x²/2-2)-(x²

原式=(x-x²+2x)/x²(x-2)*(x+2)(x-2)/(x-3)=-x(x-3)/x²(x-2)*(x+2)(x-2)/(x-3)=-(x-3)/x(x-2)*

x平方-x-2/x平方-x-6除以x平方+4x-5/x平方+3x-10=[(x-2)(x+1)/(x-3)(x+2)]/[(x+5)(x-1)/(x+5)(x-2)]=[(x-2)(x+1)/(x-3