X^(4/3) - 6X^(2/3) = -8

and

9^(2x) - 2*9^x = 3

Thanks!! :D

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- June 2nd 2010, 05:49 PMwindiaFind x
X^(4/3) - 6X^(2/3) = -8

and

9^(2x) - 2*9^x = 3

Thanks!! :D - June 2nd 2010, 06:20 PMTKHunny
These are simple quadratic forms. You must see the relationship to all other quadratics you have encountered.

Then,

This should be familiar. - June 2nd 2010, 06:44 PMwindia
Thanks!

- June 2nd 2010, 06:46 PMTKHunny
Write it in that form. Show us your efforts and additional suggestions can be offered.

Hint: - June 2nd 2010, 06:53 PMwindia
For the first equation, I got down to x^4 - 6x^2 + 2 = 0 , am I doing it right so far? :D

- June 2nd 2010, 07:08 PMTKHunny
That would depend on your substitution. What did you do? Normally, you would want to change variables. Using 'x' both before and after is certainly bad form, but mostly it's just confusing.

Try and write the whole thing in terms of 'y'. - June 2nd 2010, 07:16 PMwindia
Ohhhh haha I got them now :D !! Should have thought of substitution :p