(1)(2x+3)平方=4(2x+3)
(2x+3)²-4(2x+3)=0
(2x+3)(2x+3-4)=0
x1=-3/2,x2=1/2
(2)2(x-3)=x平方-9
(x+3)(x-3)-2(x-3)=0
(x-3)(x+3-2)=0
x1=3,x2=-1
(3)4x平方-4x+1=0
(2x-1)²=0
x1=x2=1/2
(1)(2x+3)平方=4(2x+3)
(2x+3)²-4(2x+3)=0
(2x+3)(2x+3-4)=0
x1=-3/2,x2=1/2
(2)2(x-3)=x平方-9
(x+3)(x-3)-2(x-3)=0
(x-3)(x+3-2)=0
x1=3,x2=-1
(3)4x平方-4x+1=0
(2x-1)²=0
x1=x2=1/2