src/Zend/Locale/Math.php
public static function Sqrt($op1, $scale = null)
    {
        $op1 = self::exponent($op1, $scale);
        return bcsqrt($op1, $scale);
    }
public static function Sqrt($op1, $scale = null)
    {
        $op1 = self::exponent($op1, $scale);
        return bcsqrt($op1, $scale);
    }
public static function Sqrt ( $ op1 , $ scale = null ) { $ op1 = self :: exponent ( $ op1 , $ scale ) ; return bcsqrt ( $ op1 , $ scale ) ; }
BCSqrt - fixes a problem of BCMath and exponential numbers

@param  string  $op1
@param  integer $scale
@return string
BCSqrt - fixes a problem of BCMath and exponential numbers