Hellokittysam007 Hellokittysam007

11-03-2020
Mathematics

contestada

Simplify. (6 + 5i)(10 – 15i)

Respuesta :

ACruzAquino ACruzAquino

11-03-2020

Answer:

75i^2-140i-60

Answer Link

TheBreeze TheBreeze

11-03-2020

60 - 90i + 50i - 75i^2
-75i^2 - 40i + 60

In imaginary numbers, i stands for the square root of -1. Knowing this, we know that i^2 is -1. Therefore:

-75(-1) - 40i + 60
75 + 60 - 40i
135 - 40i

Answer Link

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