Simplified (-4+2i)(3-9i)

Jcharlesworthuk asked Sep 12, 2023

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Jcharlesworthuk asked Sep 12, 2023

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20 votes

6 + 42i

Expanding the expression, by using FOIL acronym

(-4+2i)(3-9i)

-12+36i+6i-18i²

-12 +42i -18i² Remember i²= -1

-12 + 42i -18(-1)

-12 + 42i +18

6 + 42i

2) Now we have that complex number in the form a +bi

Falyoun answered Sep 17, 2023

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