4x²-5x=0
x(4x-5)=0
x=0,或4x-5=0
x=0,或x=5/4
(2x+3)²=(1-3x)²
(2x+3)²-(1-3x)²=0
(2x+3+1-3x)(2x+3-1+3x)=0
(4-x)(5x+2)=0
4-x=0,或5x+2=0
x=4,或x=-2/5