Simplify (7-6i)^2

${(7 - 6 i)}^{2}$

Step 1

Rewrite ${(7 - 6 i)}^{2}$ as $(7 - 6 i) (7 - 6 i)$ .

$(7 - 6 i) (7 - 6 i)$

Step 2

Expand $(7 - 6 i) (7 - 6 i)$ using the FOIL Method.

Apply the distributive property.

$7 (7 - 6 i) - 6 i (7 - 6 i)$

Apply the distributive property.

$7 \cdot 7 + 7 (- 6 i) - 6 i (7 - 6 i)$

Apply the distributive property.

$7 \cdot 7 + 7 (- 6 i) - 6 i \cdot 7 - 6 i (- 6 i)$

Step 3

Simplify and combine like terms.

Simplify each term.

Multiply $7$ by $7$ .

$49 + 7 (- 6 i) - 6 i \cdot 7 - 6 i (- 6 i)$

Multiply $- 6$ by $7$ .

$49 - 42 i - 6 i \cdot 7 - 6 i (- 6 i)$

Multiply $7$ by $- 6$ .

$49 - 42 i - 42 i - 6 i (- 6 i)$

Multiply $- 6 i (- 6 i)$ .

Multiply $- 6$ by $- 6$ .

$49 - 42 i - 42 i + 36 i i$

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

$49 - 42 i - 42 i + 36 (i^{1} i)$

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

$49 - 42 i - 42 i + 36 (i^{1} i^{1})$

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

$49 - 42 i - 42 i + 36 i^{1 + 1}$

Add $1$ and $1$ .

$49 - 42 i - 42 i + 36 i^{2}$

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

$49 - 42 i - 42 i + 36 \cdot - 1$

Multiply $36$ by $- 1$ .

$49 - 42 i - 42 i - 36$

Subtract $36$ from $49$ .

$13 - 42 i - 42 i$

Subtract $42 i$ from $- 42 i$ .

$13 - 84 i$