Algebra Examples

$(2 + 6 i) + (- 3 + - 9 i)$

Step 1

Replace all occurrences of $+$ $-$ with a single $-$ . A plus sign followed by a minus sign has the same mathematical meaning as a single minus sign because $1 \cdot - 1 = - 1$

$2 + 6 i - 3 - 9 i$

Step 2

Simplify the expression.

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Step 2.1

Remove parentheses.

$2 + 6 i - 3 - 9 i$

Step 2.2

Subtract $3$ from $2$ .

$- 1 + 6 i - 9 i$

Step 3

Subtract $9 i$ from $6 i$ .

$- 1 - 3 i$