X÷2-X÷4=2.4
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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
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
第一题:x-x/5=2.45x-x=124x=12x=3第二题:12/5%x=8240x=8x=1/30第三题:4x+x=12.55x=12.5x=2.5
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+