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kumpel [21]
2 years ago
6

What are the solutions of the equation 9x4 - 2x2 - 7 = 0? Use u substitution to solve.

Mathematics
1 answer:
avanturin [10]2 years ago
8 0
9x^4 - 2x^2 - 7 = 0
(x + 1)(x - 1)(9x^2 + 7) = 0
Therefore, x = -1 , OR x = 1.

9x^2 + 7 has no real solutions.

Hope it helps : )
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3 years ago
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8 0
3 years ago
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