VB中sqr是什么啊?我昨天开始学习VB的,学到第三章有个地方不明白,希望各位大哥大姐叔叔阿姨指定我一下,先感谢了Dim a As Double 'a.b.c方程系数Dim b As DoubleDim c As DoubleDim x1 As Double 'x1x2为方程的根Dim x2 As DoubleDim result As Double 'result为公式Private Sub Form_Click() a = 3 'abc赋值 b = 8 c = 2 result = Sqr(b * b - 4 * a * c) '计算公式 x1 = (-b + result) / (2 * a) '计算结果

VB中sqr是什么啊?
我昨天开始学习VB的,学到第三章有个地方不明白,希望各位大哥大姐叔叔阿姨指定我一下,先感谢了
Dim a As Double 'a.b.c方程系数
Dim b As Double
Dim c As Double
Dim x1 As Double 'x1x2为方程的根
Dim x2 As Double
Dim result As Double 'result为公式
Private Sub Form_Click()
a = 3 'abc赋值
b = 8
c = 2
result = Sqr(b * b - 4 * a * c) '计算公式
x1 = (-b + result) / (2 * a) '计算结果
x2 = (-b + result) / (2 * a)
Print x1 '显示计算结果
Print x2
End Sub
显示计算结果等于-.279240779943873
-.279240779943873
哎,我数学没学好,那个
result = Sqr(b * b - 4 * a * c)
意思是结果=sqr(40)吗?
sqr是什么意思怎么算出来的啊?
麻烦各位教我一下,谢谢了