分式~会滴来哦1..-a^3/2c÷5a^2/-6cd2.y-3/4y-8÷(y+2-5/y-2)3.1+(a-1/1-a)÷(1+a/a^2-2a+1)4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y),其中,x=-2,y=-15.x+2/x-2=x/x+1
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![分式~会滴来哦1..-a^3/2c÷5a^2/-6cd2.y-3/4y-8÷(y+2-5/y-2)3.1+(a-1/1-a)÷(1+a/a^2-2a+1)4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y),其中,x=-2,y=-15.x+2/x-2=x/x+1](/uploads/image/z/2694529-1-9.jpg?t=%E5%88%86%E5%BC%8F%7E%E4%BC%9A%E6%BB%B4%E6%9D%A5%E5%93%A61..-a%5E3%2F2c%C3%B75a%5E2%2F-6cd2.y-3%2F4y-8%C3%B7%EF%BC%88y%2B2-5%2Fy-2%293.1%2B%28a-1%2F1-a%29%C3%B7%281%2Ba%2Fa%5E2-2a%2B1%294.%EF%BC%88x%2Fx-y-1%29%C3%B7y%5E2%2Fx%2By%C3%97%EF%BC%88x-x%5E2%2Fx%2By%29%2C%E5%85%B6%E4%B8%AD%2Cx%3D-2%2Cy%3D-15.x%2B2%2Fx-2%3Dx%2Fx%2B1)
分式~会滴来哦1..-a^3/2c÷5a^2/-6cd2.y-3/4y-8÷(y+2-5/y-2)3.1+(a-1/1-a)÷(1+a/a^2-2a+1)4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y),其中,x=-2,y=-15.x+2/x-2=x/x+1
分式~会滴来哦
1..-a^3/2c÷5a^2/-6cd
2.y-3/4y-8÷(y+2-5/y-2)
3.1+(a-1/1-a)÷(1+a/a^2-2a+1)
4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y),其中,x=-2,y=-1
5.x+2/x-2=x/x+1
分式~会滴来哦1..-a^3/2c÷5a^2/-6cd2.y-3/4y-8÷(y+2-5/y-2)3.1+(a-1/1-a)÷(1+a/a^2-2a+1)4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y),其中,x=-2,y=-15.x+2/x-2=x/x+1
1..-a^3/2c÷5a^2/-6cd
=(a^3/2c)*(6cd/5a^2)=3ad/5
2.y-3/4y-8÷(y+2-5/y-2)
=[(y-3)/4(y-2)]*(y-2)/(y-3)=1/4
3.1+(a-1/1-a)÷(1+a/a^2-2a+1)
=1-1*(a+1)/(a-1)^2=(a^2+3a)/(a+1)
4.(x/x-y-1)÷y^2/x+y×(x-x^2/x+y)
=x/((x-y-1)*(x+y)/y^2*x*(1-x)/(x+y)
=x^2(1-x)/(x-y-1)
=4(1+2)/(-2+1-1)
=-6
5.x+2/x-2=x/x+1
(x+2)(x+1)=x(x-2)
x^2+3x+2=x^2-2x
x=-2/5