x÷2 x÷4=1.5-搜答案-智慧作业帮

1+(2x-4)/(x^2-a-2)]/[(x+3)/(x^2-1)]={1+2(x-2)/[(x-2)(x+1)]}(x^2-1)/(x+3)=[1+2/(x+1)](x+1)(x-1)/(x+3)

(x+1)(x²-x+1)+6x³÷(-2x²)+(-x^6)÷x^4,=x³+1-3x-x^2,=x^3-x^2-3x+1=-8-4+6+1=-5

(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/

①15X÷2=60 15X×12=60 &nbs

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

(x+2分之2x-x-2分之x)÷x²-4分之x（x+2x/2-x-x/2）÷x²-x/4=x/2÷x²-x/4=1/2x-x/4很高兴为您解答,祝你学习进步!有不明白的

（x+2/x²-2x-x-1/x²-4x+4）÷x-4/x={(x+2)(x-2)/[x(x-2)²]-x(x-1)/[x(x-2)²]}·x/(x-4)={(

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

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

原式=x^2+4x+4x^2-1-4x^2-4x=x^2-1代入x=-2原式=3

（x-2）(x+3)=0x=2(舍去),x=-3(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4)=(x+根号二)/(x-2)÷(x+2)²/(x+2)(x-2

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

分子分母可以化简的,十字相乘法学过吗?

2x-6/4-4x+x^2÷x-3/x-2=-2x-7/2+x-3/x=-x-3/x-7/2=1+3-7/21/2

0.3+0.3x=0.39x=0.32x-1.5x=7.6xx=00.36x÷0.3=1.2x=16（x+1.2)=18.6x=1.97x+2x=8.1x=0.9(x-5）÷3=1.7x=10.15（

原式=2(x-3)/(x-2)²×1/(x+3)×(x-2)(x+3)/[-(x-3)]=-2/(x-2)当x=-1/2时原式=-2/（-5/2）=4/5

x²－3x＝2x＋14x²－5x＝14∴﹙4x³－6x²＋2x﹚/2x－﹙x＋1﹚²＋1＝2x²－3x＋1－x²－2x－1＋1＝x

x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)=x((2x-1)/x)+x/(x^2-2x)x(x^2-4)/(3-x)=(2x-1)+(x+2)/(3-x)=(7x-3-2x^2

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