Evaluate 8/(2+2i)

$\frac{8}{2 + 2 i}$

Step 1

Cancel the common factor of $8$ and $2 + 2 i$ .

Factor $2$ out of $8$ .

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

Cancel the common factors.

Factor $2$ out of $2$ .

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

Factor $2$ out of $2 i$ .

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

Factor $2$ out of $2 (1) + 2 (i)$ .

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

Cancel the common factor.

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

Rewrite the expression.

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

Step 2

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

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

Step 3

Multiply.

Combine.

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

Simplify the numerator.

Apply the distributive property.

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

Multiply $4$ by $1$ .

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

Multiply $- 1$ by $4$ .

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

Simplify the denominator.

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

Apply the distributive property.

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

Apply the distributive property.

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

Apply the distributive property.

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

Simplify.

Multiply $1$ by $1$ .

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

Multiply $- 1$ by $1$ .

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

Multiply $1$ by $1$ .

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

Multiply $- 1$ by $1$ .

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

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

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

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

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

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

$\frac{4 - 4 i}{1 - 1 i + 1 i - i^{1 + 1}}$

Add $1$ and $1$ .

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

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

$\frac{4 - 4 i}{1 + 0 - i^{2}}$

Add $1$ and $0$ .

$\frac{4 - 4 i}{1 - i^{2}}$

Simplify each term.

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

$\frac{4 - 4 i}{1 - - 1}$

Multiply $- 1$ by $- 1$ .

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

Add $1$ and $1$ .

$\frac{4 - 4 i}{2}$

Step 4

Cancel the common factor of $4 - 4 i$ and $2$ .

Factor $2$ out of $4$ .

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

Factor $2$ out of $- 4 i$ .

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

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

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

Cancel the common factors.

Factor $2$ out of $2$ .

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

Cancel the common factor.

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

Rewrite the expression.

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

Divide $2 - 2 i$ by $1$ .

$2 - 2 i$

Evaluate 8/(2+2i)

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