19-10-2017
Mathematics

contestada

(6-4i)^2 how do i do this

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taniaorozco taniaorozco

19-10-2017

(6 - 4i)²

use square of difference;

6² - 2 × 6 × 4i + (4i)²

use multiplication distributive property;

36 - 2 × 6 × 4i + 4²i²

36 - 2 × 6 × 4i + 16i²

36 - 2 × 6 × 4i + 16 × -1

36 - 48i + 16 × -1

36 - 48i - 16

(36 - 16) - 48i

20 - 48i

hope that helps, God bless!

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