How do you simplify $(-3+6i)+(1-9i)$ ?

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Answer 1 · 2018-04-14T13:47:06

$-2-3i$

$"remove the parenthesis and collect like terms"$

$=color(blue)(-3)color(red)(+6i)color(blue)(+1)color(red)(-9i)$

$=-2-3i$

How do you simplify (-3+6i)+(1-9i)(-3+6i)+(1-9i)?