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Math2400
 one year ago
can someone help me solve this (easy but haven't done it in a while)
Math2400
 one year ago
can someone help me solve this (easy but haven't done it in a while)

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xcharlizea
 one year ago
Best ResponseYou've already chosen the best response.0sure thing boo thangg

Math2400
 one year ago
Best ResponseYou've already chosen the best response.0\[0.27 = \frac{ 110^2 }{ (y111)^2 (y55) }\]

xcharlizea
 one year ago
Best ResponseYou've already chosen the best response.0lmaoo hold up gimme a min

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1What are we doin? +_+ solvin for y?

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1Multiply and divide some things,\[\Large\rm (y111)^2 (y55)= \frac{ 110^2 }{0.27 }\]Then I guess expand out all those brackets.

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1Then you get a cubic.... which.... might be hard to solve :d hmm

Math2400
 one year ago
Best ResponseYou've already chosen the best response.0wait it's supposed to be (y110)^2 lol not 111/ but how do u do a cubic? LOL

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1\[\Large\rm (y110)^2 (y55)= \frac{ 110^2 }{0.27 }\]Well you know how you have your nice `quadratic formula` for dealing with squares? x= b+/sqrt(b^2.... Well there is one for cubics, but it's extremely long and complex, not worth using most of the time. We could try applying rational root theorem to find a factor, and then factor it. If it doesn't factor, then..... oh boy +_+

Math2400
 one year ago
Best ResponseYou've already chosen the best response.0what is the equation for cubic? lol i think my professor wants us to know

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1i doubt it :) lol http://www.math.vanderbilt.edu/~schectex/courses/cubic/

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1it's the formula that's taking up two lines

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1or you could just cheat and use wolfram +_+ https://www.wolframalpha.com/input/?i=%28y110%29%5E2%28y55%29%3D110%5E2%2F0.27

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1it's a weird solution.. not one we could've come up with just by checking roots and stuff :d

zepdrix
 one year ago
Best ResponseYou've already chosen the best response.1There is probably some calculus techniques you could use to get really close to the solution... blah
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