(X+24)-9分之1(X+24)＝11分之12X-搜答案-神马作文网

x²+3分之2x+9分之1

x²+3分之2x+9分之1=x²+2*1/3*x+（1/3）^2=（x+1/3)^2

请加括号再问：没有括号再答：是这样吗？x/(x-2)+x/(x-7)-9=x/(x-1)+1+x/(x-6)-8再问：是：x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(

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1)将各项通分（*24）得5x=9x-12-48可解得x=152）如上法得6x=4x-8-45可解得x=-2分之533）得6x+9=84x-21-35可解得x=6分之5

x+2分之x+1+x+9分之x+8=x+3分之x+2+x+8分之x+7即x+2分之1+x+9分之1=x+3分之1+x+8分之1即x+2分之1-x+3分之1=+x+8分之1-x+9分之1（x＋2）（x＋

(x-3)分之1+(6+2x)分之1-x-(x²-9)分之6=1/(x-3)+(1-x)/2(x+3)-6/(x+3)(x-3)=[2(x+3)+(1-x)(x-3)-12]/2(x+3)(

[(x+2)+1]/(x+2)-[(x+1)+1]/(x+1)=[(x+4)+1]/(x+4)-[(x+3)+1]/(x+3)1+1/(x+2)-1-1/(x+1)=1+1/(x+4)-1-1/(x+

思路：我们知道：1/3*2=(3-2)/3*2=3/3*2-2/3*2=1/2-1/3类比得：1/n*(n-1)=[n-(n-1)]/n*(n-1)=n/n*(n-1)-(n-1)/n*(n-1)=1

2/(x+3)(x-3）+(x-2)/x(x-3)=1/x(x+3)两边乘x(x+3)(x-3)2x+x^2+x-6=x-3x^2+2x-3=0(x+3)(x-1)=0x+3在分母,不等于0所以x=1

(x-3)分之x-(x^2-3x)分之(x+6)+x分之1等于几?=x²/x(x-3)-(x+6)/x(x-3)+(x-3)/x(x-3)=(x²-x-6+x-3)/x(x-3)=

公分母是2(x+3)²(x-3)所以6-2x分之x-1=2(x+3)²(x-3)分之[-2(x-1)(x+3)²]x²-9分之6=2(x+3)²(x-

原式=1/(x+1)*[(x-3)/(x+3)^2+2/(x+3)]-x/(x+3)(x-3)=1/(x+1)[3(x+1)/(x+3)^2]-x/(x+3)(x-3)=3/(x+3)^2-x/(x+

4-4x分之9x-9=9(x-1)/4(1-x)=-9/4

两边乘以66得6(x-9)-22(x+2)=66(x-1)-33(x-2)6x-54-22x-44=66x-66-33x+66-49x=98x=-2

X(X+3)分之1+(X+3)(X+6)分之1+(x+6)(X+9)分之1=2(X+9)分之33{1/x-1/(x+3)+1/(x+3)-1/(x+6)+1/(x+6)-1/(x+9)}=3/(2(x

[(x+2)-1]/(x+2)+1-1/(x+9)=1-1/(x+3)+1-1/(x+8)后面的三个仿第一个化简-1/(x+2)-1/(x+9)=1-1/(x+3)-1/(x+8)两边同时减去21/(

9分之2x+15 =2分之1x

9分之2x+15=2分之1x两边乘184x+270=9x9x-4x=2705x=270x=54

注:分子/分母(1/x-3)+(1/9-x^2)-(x-1/6-2x)通分:=2(x+3)/2(x+3)(x-3)+12/2(9-x^2)-(x-1)(3+x)/2(3-x)(3+x)=2x+6/2(