x^2-3=9
x^2=12
x=2又根号3
4(2x+1)^2-9(2x-1)²=0
(2(2x+1)-3(2x-1))(2(2x+1)+3(2x-1))=0(平方差)
(5-2x)(10x-1)=0(化解)
x1=5/2 x2=1/10