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Please help!
1.Perform the indicated operation and write the result in the form a+bi
-9i(-9i+4)+3(8+8i)
A. 12+57i
B. 57-60i
C. -105-60i
D. -57-12i

Respuesta :

musiclover10045

-9i(-9i+4)+3(8+8i)


Use the distributive property to remove the parenthesis:


-9i * -9i = 81i^2

-9i x 4 = -36i

3x8 = 24

3x8i = 24i

Now you have 81i^2 - 36i + 24 + 24i


i^2 = -1


Now you have 81 x -1 - 36i + 24 + 24i


-81 +24 = -57

-36i +24i = -12i


Final answer = -57 - 12i


The answer is D.

s1988083

Answer:

D

Step-by-step explanation:

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