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

What are the solutions of the equation 9x4 - 2x2 - 7 = 0? Use u substitution to solve
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What are the solutions of the equation 9x4 - 2x2 - 7 = 0? Use u substitution to
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What are the solutions of the equation 9x4 - 2x2 - 7 = 0? Use u substitution to solve-example-1
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