若2x²+2x-1/2x+1=x+A/2x+1,则A为______若(2x²+2x-1)/(2x+1)=x+(A)/(2x+1),则A为______A.x²+x-1B.x-1C.x²-x+1D.x+1
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![若2x²+2x-1/2x+1=x+A/2x+1,则A为______若(2x²+2x-1)/(2x+1)=x+(A)/(2x+1),则A为______A.x²+x-1B.x-1C.x²-x+1D.x+1](/uploads/image/z/5247066-66-6.jpg?t=%E8%8B%A52x%26%23178%3B%2B2x-1%2F2x%2B1%3Dx%2BA%2F2x%2B1%2C%E5%88%99A%E4%B8%BA______%E8%8B%A5%EF%BC%882x%26%23178%3B%2B2x-1%EF%BC%89%2F%EF%BC%882x%2B1%EF%BC%89%3Dx%2B%EF%BC%88A%EF%BC%89%2F%EF%BC%882x%2B1%EF%BC%89%2C%E5%88%99A%E4%B8%BA______A.x%26%23178%3B%2Bx-1B.x-1C.x%26%23178%3B-x%2B1D.x%2B1)
若2x²+2x-1/2x+1=x+A/2x+1,则A为______若(2x²+2x-1)/(2x+1)=x+(A)/(2x+1),则A为______A.x²+x-1B.x-1C.x²-x+1D.x+1
若2x²+2x-1/2x+1=x+A/2x+1,则A为______
若(2x²+2x-1)/(2x+1)=x+(A)/(2x+1),则A为______
A.x²+x-1
B.x-1
C.x²-x+1
D.x+1
若2x²+2x-1/2x+1=x+A/2x+1,则A为______若(2x²+2x-1)/(2x+1)=x+(A)/(2x+1),则A为______A.x²+x-1B.x-1C.x²-x+1D.x+1
两边乘2x+1
2x²+2x-1=x(2x+1)+A
2x²+2x-1=2x²+x+A
A=x-1
选B