# Complex.Multiply メソッド

## オーバーロード

 Multiply(Complex, Complex) 2 つの複素数の積を返します。Returns the product of two complex numbers. Multiply(Double, Complex) 倍精度実数と複素数の積を返します。Returns the product of a double-precision real number and a complex number. Multiply(Complex, Double) 複素数と倍精度実数の積を返します。Returns the product of a complex number and a double-precision real number.

## 例

``````using System;
using System.Numerics;

public class Example
{
public static void Main()
{
Complex number1 = new Complex(8.3, 17.5);
Complex[] numbers = { new Complex(1.4, 6.3),
new Complex(-2.7, 1.8),
new Complex(3.1, -2.1) };
foreach (Complex number2 in numbers)
Console.WriteLine("{0} x {1} = {2}", number1, number2,
Complex.Multiply(number1, number2));
}
}
// The example displays the following output:
//       (8.3, 17.5) x (1.4, 6.3) = (-98.63, 76.79)
//       (8.3, 17.5) x (-2.7, 1.8) = (-53.91, -32.31)
//       (8.3, 17.5) x (3.1, -2.1) = (62.48, 36.82)
``````
``````Imports System.Numerics

Module Example
Public Sub Main()
Dim number1 As New Complex(8.3, 17.5)
Dim numbers() As Complex = { New Complex(1.4, 6.3),
New Complex(-2.7, 1.8),
New Complex(3.1, -2.1) }
For Each number2 In numbers
Console.WriteLine("{0} x {1} = {2}", number1, number2,
Complex.Multiply(number1, number2))
Next
End Sub
End Module
' The example displays the following output:
'       (8.3, 17.5) x (1.4, 6.3) = (-98.63, 76.79)
'       (8.3, 17.5) x (-2.7, 1.8) = (-53.91, -32.31)
'       (8.3, 17.5) x (3.1, -2.1) = (62.48, 36.82)
``````

## 注釈

Multiply メソッドを使用すると、複素数を含む乗算演算を実行できます。The Multiply methods allow performing multiplication operations that involve complex numbers.

Multiply メソッドは、カスタム演算子をサポートしない言語に対して実装されます。The Multiply method is implemented for languages that do not support custom operators. その動作は、乗算演算子を使用した乗算と同じです。Its behavior is identical to multiplication using the multiplication operator.

## Multiply(Complex, Complex)

2 つの複素数の積を返します。Returns the product of two complex numbers.

``````public:
static System::Numerics::Complex Multiply(System::Numerics::Complex left, System::Numerics::Complex right);``````
``public static System.Numerics.Complex Multiply (System.Numerics.Complex left, System.Numerics.Complex right);``
``static member Multiply : System.Numerics.Complex * System.Numerics.Complex -> System.Numerics.Complex``
``Public Shared Function Multiply (left As Complex, right As Complex) As Complex``

left
Complex

right
Complex

#### 戻り値

`left``right` の 2 つのパラメーターの積。The product of the `left` and `right` parameters.

### 注釈

(ac-bd) + (ad + bc) i(ac - bd) + (ad + bc)i

## Multiply(Double, Complex)

``````public:
static System::Numerics::Complex Multiply(double left, System::Numerics::Complex right);``````
``public static System.Numerics.Complex Multiply (double left, System.Numerics.Complex right);``
``static member Multiply : double * System.Numerics.Complex -> System.Numerics.Complex``
``Public Shared Function Multiply (left As Double, right As Complex) As Complex``

left
Double

right
Complex

#### 戻り値

`left``right` の 2 つのパラメーターの積。The product of the `left` and `right` parameters.

## Multiply(Complex, Double)

``````public:
static System::Numerics::Complex Multiply(System::Numerics::Complex left, double right);``````
``public static System.Numerics.Complex Multiply (System.Numerics.Complex left, double right);``
``static member Multiply : System.Numerics.Complex * double -> System.Numerics.Complex``
``Public Shared Function Multiply (left As Complex, right As Double) As Complex``

left
Complex

right
Double

#### 戻り値

`left``right` の 2 つのパラメーターの積。The product of the `left` and `right` parameters.

ac + bciac + bci