y^2-7y/2+3=0

问题描述:

y^2-7y/2+3=0

y²-7y/2+3=0
y²-7y/2+(7/4)²-1/16=0
(y-7/4)²=1/16
y-7/4=1/4 or y-7/4=-1/4
y=2 or y=3/2
所以y= 2 or 3/2