(x+1)^2=9/4=(3/2)^2
x+1=3/2或x+1=-3/2
x=1/2或x=-5/2
(x+1)²=9/4
x+1=根号(9/4)=3/2或-3/2
x=1/2 =0.5 或x=-5/2=-2.5
4(x+1)²-9=0
解:4(x+1)²-9+9=0+9
4(x+1)²=9
4(x+1)²÷4=9÷4
(x+1)²=2.25
x+1=根号2.25
x+1=1.5
x=0.5
由题意得 (x+1)²=9/4
x+1=±(3/2)
x=1/2或x=-5/2