y方等于5,y等于几
问题描述:
y方等于5,y等于几
如题.y方等于5,那么y等于几?
答
Y^2=5,
∵(±√5)^2=5,
∴Y=±√5.
y方等于5,y等于几
如题.y方等于5,那么y等于几?
Y^2=5,
∵(±√5)^2=5,
∴Y=±√5.