simplify: (-3v(-5))^(2)

Question

a. -45i
b. 45
c. -45
d. -45i^(2)

Answer 1

(-3√(-5))^2

= (-3)^2 (√(-5))^2, distributing the power to every factor

= 9*5 (i)^2, since √(-5) = √(5) i

= -45, since i^2 = -1

Answer: c