Use demoivre’s theorem to write the complex number in trigonometric form. (cos(3pi/t)+isin (3pi/5))^3 your choices are: 3(cos(9pi/5)+isin (9pi/5)) (cos(3pi/15)+isin (3pi/15)) 3(cos(3pi/15)+isin (3pi/15)) (cos(9pi/5)+isin (9pi/5))

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down

step-by-step explanation:

option: d is correct

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15