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Find all real x that satisfy
\[\large 9^x - 4 \cdot 3^x + 6 - \frac{4}{3^x} + \frac{1}{9^x} = 0\]

 Jan 17, 2021
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I will give you 2 good hints.

You can come back with your thoughts if you need more help.

 

1)   let y=3^x

 

2)  \((a-b)^4=a^4-4a^3b+6a^2b^2-4ab^3+b^4\)

 Jan 17, 2021

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