Simplify (4+2i)÷(1+i)

$(4 + 2 i) \div (1 + i)$

Step 1

Rewrite the division as a fraction.

$\frac{4 + 2 i}{1 + i}$

Step 2

Multiply the numerator and denominator of $\frac{4 + 2 i}{1 + 1 i}$ by the conjugate of $1 + 1 i$ to make the denominator real.

$\frac{4 + 2 i}{1 + 1 i} \cdot \frac{1 - i}{1 - i}$

Step 3

Multiply.

Combine.

$\frac{(4 + 2 i) (1 - i)}{(1 + 1 i) (1 - i)}$

Simplify the numerator.

Expand $(4 + 2 i) (1 - i)$ using the FOIL Method.

Apply the distributive property.

$\frac{4 (1 - i) + 2 i (1 - i)}{(1 + 1 i) (1 - i)}$

Apply the distributive property.

$\frac{4 \cdot 1 + 4 (- i) + 2 i (1 - i)}{(1 + 1 i) (1 - i)}$

Apply the distributive property.

$\frac{4 \cdot 1 + 4 (- i) + 2 i \cdot 1 + 2 i (- i)}{(1 + 1 i) (1 - i)}$

Simplify and combine like terms.

Simplify each term.

Multiply $4$ by $1$ .

$\frac{4 + 4 (- i) + 2 i \cdot 1 + 2 i (- i)}{(1 + 1 i) (1 - i)}$

Multiply $- 1$ by $4$ .

$\frac{4 - 4 i + 2 i \cdot 1 + 2 i (- i)}{(1 + 1 i) (1 - i)}$

Multiply $2$ by $1$ .

$\frac{4 - 4 i + 2 i + 2 i (- i)}{(1 + 1 i) (1 - i)}$

Multiply $2 i (- i)$ .

Multiply $- 1$ by $2$ .

$\frac{4 - 4 i + 2 i - 2 i i}{(1 + 1 i) (1 - i)}$

Raise $i$ to the power of $1$ .

$\frac{4 - 4 i + 2 i - 2 (i^{1} i)}{(1 + 1 i) (1 - i)}$

Raise $i$ to the power of $1$ .

$\frac{4 - 4 i + 2 i - 2 (i^{1} i^{1})}{(1 + 1 i) (1 - i)}$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{4 - 4 i + 2 i - 2 i^{1 + 1}}{(1 + 1 i) (1 - i)}$

Add $1$ and $1$ .

$\frac{4 - 4 i + 2 i - 2 i^{2}}{(1 + 1 i) (1 - i)}$

Rewrite $i^{2}$ as $- 1$ .

$\frac{4 - 4 i + 2 i - 2 \cdot - 1}{(1 + 1 i) (1 - i)}$

Multiply $- 2$ by $- 1$ .

$\frac{4 - 4 i + 2 i + 2}{(1 + 1 i) (1 - i)}$

Add $4$ and $2$ .

$\frac{6 - 4 i + 2 i}{(1 + 1 i) (1 - i)}$

Add $- 4 i$ and $2 i$ .

$\frac{6 - 2 i}{(1 + 1 i) (1 - i)}$

Simplify the denominator.

Expand $(1 + 1 i) (1 - i)$ using the FOIL Method.

Apply the distributive property.

$\frac{6 - 2 i}{1 (1 - i) + 1 i (1 - i)}$

Apply the distributive property.

$\frac{6 - 2 i}{1 \cdot 1 + 1 (- i) + 1 i (1 - i)}$

Apply the distributive property.

$\frac{6 - 2 i}{1 \cdot 1 + 1 (- i) + 1 i \cdot 1 + 1 i (- i)}$

Simplify.

Multiply $1$ by $1$ .

$\frac{6 - 2 i}{1 + 1 (- i) + 1 i \cdot 1 + 1 i (- i)}$

Multiply $- 1$ by $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i \cdot 1 + 1 i (- i)}$

Multiply $1$ by $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i + 1 i (- i)}$

Multiply $- 1$ by $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i - i i}$

Raise $i$ to the power of $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i - (i^{1} i)}$

Raise $i$ to the power of $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i - (i^{1} i^{1})}$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{6 - 2 i}{1 - 1 i + 1 i - i^{1 + 1}}$

Add $1$ and $1$ .

$\frac{6 - 2 i}{1 - 1 i + 1 i - i^{2}}$

Add $- 1 i$ and $1 i$ .

$\frac{6 - 2 i}{1 + 0 - i^{2}}$

Add $1$ and $0$ .

$\frac{6 - 2 i}{1 - i^{2}}$

Simplify each term.

Rewrite $i^{2}$ as $- 1$ .

$\frac{6 - 2 i}{1 - - 1}$

Multiply $- 1$ by $- 1$ .

$\frac{6 - 2 i}{1 + 1}$

Add $1$ and $1$ .

$\frac{6 - 2 i}{2}$

Step 4

Cancel the common factor of $6 - 2 i$ and $2$ .

Factor $2$ out of $6$ .

$\frac{2 \cdot 3 - 2 i}{2}$

Factor $2$ out of $- 2 i$ .

$\frac{2 \cdot 3 + 2 (- i)}{2}$

Factor $2$ out of $2 (3) + 2 (- i)$ .

$\frac{2 (3 - i)}{2}$

Cancel the common factors.

Factor $2$ out of $2$ .

$\frac{2 (3 - i)}{2 (1)}$

Cancel the common factor.

$\frac{2 (3 - i)}{2 \cdot 1}$

Rewrite the expression.

$\frac{3 - i}{1}$

Divide $3 - i$ by $1$ .

$3 - i$

Simplify (4+2i)÷(1+i)

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