Respuesta :

ACruzAquino

Answer:

75i^2-140i-60

TheBreeze
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