^{4x-5}=-20

I know that I'm supposed to use log to isolate the variable, but I can't take the log of a negative number.

Could someone please explain how to solve this in steps?

Thanks

So I'm stuck on this question: -6^{4x-5}=-20

I know that I'm supposed to use log to isolate the variable, but I can't take the log of a negative number.

Could someone please explain how to solve this in steps?

Thanks

I know that I'm supposed to use log to isolate the variable, but I can't take the log of a negative number.

Could someone please explain how to solve this in steps?

Thanks

- little_dragon
**Posts:**219**Joined:**Mon Dec 08, 2008 5:18 pm-
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sully039 wrote:So I'm stuck on this question: -6^{4x-5}=-20

I know that I'm supposed to use log to isolate the variable, but I can't take the log of a negative number.

no but U can multiply thru by -1 to get rid of the negs on both sides

then do logs

Oh...right I feel kinda dumb now lol

Thanks for the help

Thanks for the help