I can't do my homework. Could you please help me?

I need to solve this one:

5x x 5^2x+1 = 40

and this one, too:

4x^6 - 48 = 4

Results 1 to 7 of 7

- Feb 4th 2009, 08:22 PM #1

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- Feb 4th 2009, 08:26 PM #2
Your first equation is unintelligible. Do you mean $\displaystyle (5x) 5^{2x + 1} = 40$ ? You will need to post it much more clearly.

For the second, do you mean $\displaystyle 4 x^6 - 48 = 4$ ? In which case yu have $\displaystyle 4 x^6 = 52 \Rightarrow x^6 = \frac{52}{4} = 13$. Now take the sixth root of each side.

- Feb 4th 2009, 09:59 PM #3

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- Feb 4th 2009, 10:30 PM #4

- Feb 4th 2009, 10:40 PM #5

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- Feb 4th 2009, 11:00 PM #6

- Feb 5th 2009, 07:15 AM #7

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