2 years ago

PLEASE HELP ME I DONT KNOW THE ANSWERR

Mathematics

2 answers:

Rom4ik [11]2 years ago

6 0

I can’t see the question bro

LiRa [457]2 years ago

6 0

Let u = x^(1/3)

Then,

u^2 - 6u - 27 = 0

(u-9)(u+3)=0
u = 9, u = -3

Substitute back

X^(1/3) = 9
(X^(1/3))^3 = 9^3
X = 729

And
X^(1/3) = -3
(X^(1/3))^3 = -3^3
X = -27

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