Question

求解。。f（2x+1）=x的平方-3x+1.。。。。。求法f（x）..配凑法

Answer 1

令2x1=t则x=t-1/2原方程为f(t)=(t-1/2)的平方+3(t-1/2)+1=t的平方/4+1/2t-1/4然后用x带换t即为所求答案