Solution: x≠-1/2, -1
The original equation becomes
(4x+3)²=18/(2x+1) (2x+2)
Introduction parameters a, b
a=2x+1
b=2x+2
a+b=4x+3
∴(a+b)²=18/ab…① ∴ab(a+b)²=18…② 3 Also ∵b-a=1, ∴b=a+1…③ Substitute ② a(a+1)(2a+1)²=18
(a²+a)(4a²+4a+1)=18
∴(4a²+4a)(4a²+4a+1)=72
(4a²+4a)²+(4a²+4a)-72=0
∴(4a²+4a+9)(4a²+4a-8)=0
∴(4a²+4a+9)(a²+a-2)=0
∴(4a²+4a+9)(a+2)(a-1)=0
∴a=-2 or a=1
∴a=-2 or a=1
When a=-2, 2x+1=-2, x=-3/2
When a=1, 2x+1=1, x=0
∴The solution of the original equation is: x1=-3/2, x2=0
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