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3 years ago

PLEASE HELP!

Mathematics

2 answers:

son4ous [18]3 years ago

6 0

Answer:

Do u still need the answer?

Step-by-step explanation:

nevsk [136]3 years ago

3 0

Answer:

-3
1.5(1 + i√3)
1.5(1 - i√3)

Step-by-step explanation:

y³ + 27 = 0
(y + 3)(y² - 3y + 9) = 0

1. y + 3 = 0 ⇒

y = -3

2. y² - 3y + 9 = 0

y = (3 ±√(3² -4*9))/2
y = (3 ± √-27)/2
y = (3 ± i√27)/2
y = 3/2(1 ± i√3)
y = 1.5(1 ± i√3)

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