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March 3rd, 2014, 03:23 AM  #1 
Newbie Joined: Feb 2014 Posts: 6 Thanks: 0  Help me to find this What is value of 6y=? 
March 3rd, 2014, 11:31 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Help me to find this
In the 2nd term: is that x^(2y) or x^2 times y ? If it's x^(2y), then it's an almost "impossible" equation, solvable only (I think) by numeric methods. It can be simplified to: x^3 + x^2  4xy^2 + 2x*(2y) + 4xy  4y^2 = 0 
March 4th, 2014, 02:39 AM  #3 
Newbie Joined: Feb 2014 Posts: 6 Thanks: 0  Re: Help me to find this
oohh,how about if we use 2x^2y?

March 4th, 2014, 03:12 AM  #4  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Help me to find this Quote:
 
March 4th, 2014, 03:39 AM  #5 
Newbie Joined: Feb 2014 Posts: 6 Thanks: 0  Re: Help me to find this
Sorry,i got this question from my friend and he couldn't find the answer. If the question change into: What is the value of 6y? 
March 4th, 2014, 03:52 AM  #6 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Help me to find this
Ok, then you have a quadratic in "y": (4x + 4)y^2  (2x^2 + 4x)y  x^2  x^3 = 0 Solve for y, then multiply by 6 since for some silly reason you're asking for value of 6y 
March 4th, 2014, 11:26 AM  #7 
Global Moderator Joined: Dec 2006 Posts: 20,966 Thanks: 2216 
Perhaps the friend got it written incorrectly. If the equation should have been that simplifies to 4y  x² = 2y + x, so that 6y = 3x² + 3x. 
March 4th, 2014, 04:31 PM  #8  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Help me to find this Quote:
Example: x/d  y/d = d is simply x  y = d^2  

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