Help?

Question

Help?

anonymous · Answer

attachment

anonymous · Answer

I don't understand the second one at all, could someone write it out for me and explain it?

anonymous · Answer

@Official_Hotboy any clue?

anonymous · Answer

its squaring but not anything ive seen before i cant help sorry :/

anonymous · Answer

@campbell_st ?!

anonymous · Answer

factor tree might help

anonymous · Answer

to find least common factors

campbell_st · Answer

do you know how to use logarithms...?

anonymous · Answer

I know that you're supposed to use them, but I'm really confused on how.

anonymous · Answer

@campbell_st

anonymous · Answer

Could you possibly at all, do it for me then explain??

campbell_st · Answer

ok... so take the logs of both sides

$$\log(81^y) = \log(18)$$

using some log laws it can be written as 

$$y log(81) = \log(18)$$

which becomes 

$$y = \frac{\log(18)}{\log(81)}$$

anonymous · Answer

so y = log^3/4?

campbell_st · Answer

if you think thats the answer... use your calculator to check... 

$$81^{\log{\frac{3}{4}}}$$

I'd leave my answer as the one above...

anonymous · Answer

so just leave it y = log(18)/log(81)?

campbell_st · Answer

that would be by guess.... it can be simplified by applying some log laws.... but if you're not confident... leave it