Ellianar38650 Ellianar38650

06-02-2020
Mathematics

contestada

What is the answer to this?
(2i-6)(3i-9)

Respuesta :

nonsibi nonsibi

06-02-2020

Remember that i² = -1. Using FOIL...

(2i-6)(3i-9) = 6i²-36i+54

Now simplify by subbing in -1 for i².

6(-1)-36i+54 = 48-36i

answer: 48-36i

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