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qwelly [4]
3 years ago
15

What are the solutions of the equation x6 – 9x3 + 8 = 0? Use u substitution to solve.

Mathematics
1 answer:
Natalka [10]3 years ago
4 0
X6 – 9x3 + 8 = 0
let u = x^3
u^2 - 9u + 8 = 0 
(u-8)(u-1) = 0
u = 1,8
back substitute 
1 = x^3
8 = x^3

<span>x = 1 , 2</span>
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