Simplify (4-3i)(2+i)

$(4 - 3 i) (2 + i)$

Step 1

Expand $(4 - 3 i) (2 + i)$ using the FOIL Method.

Apply the distributive property.

$4 (2 + i) - 3 i (2 + i)$

Apply the distributive property.

$4 \cdot 2 + 4 i - 3 i (2 + i)$

Apply the distributive property.

$4 \cdot 2 + 4 i - 3 i \cdot 2 - 3 i i$

$4 \cdot 2 + 4 i - 3 i \cdot 2 - 3 i i$

Step 2

Simplify and combine like terms.

Simplify each term.

Multiply $4$ by $2$ .

$8 + 4 i - 3 i \cdot 2 - 3 i i$

Multiply $2$ by $- 3$ .

$8 + 4 i - 6 i - 3 i i$

Multiply $- 3 i i$ .

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

$8 + 4 i - 6 i - 3 (i^{1} i)$

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

$8 + 4 i - 6 i - 3 (i^{1} i^{1})$

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

$8 + 4 i - 6 i - 3 i^{1 + 1}$

Add $1$ and $1$ .

$8 + 4 i - 6 i - 3 i^{2}$

$8 + 4 i - 6 i - 3 i^{2}$

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

$8 + 4 i - 6 i - 3 \cdot - 1$

Multiply $- 3$ by $- 1$ .

$8 + 4 i - 6 i + 3$

$8 + 4 i - 6 i + 3$

Add $8$ and $3$ .

$11 + 4 i - 6 i$

Subtract $6 i$ from $4 i$ .

$11 - 2 i$

$11 - 2 i$

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