Many Thanks!Quote:

Makexthe subject of y(x^2+a^2)=a^3

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- May 12th 2009, 10:51 AMBabyMiloMake x the subject of y(x^2+a^2)=a^3Quote:

Make*x*the subject of y(x^2+a^2)=a^3

- May 12th 2009, 11:14 AMHallsofIvy
You want to solve $\displaystyle y(x^2+ a^2)= a^3$ for a.

Okay, multiplying the left side, $\displaystyle x^2y+ a^2y= a^3$ which is the same as $\displaystyle a^3- ya^2- x^2y= 0$. That is a cubic equation and there is a formula for the solution- unfortunately, it is very complicated.

Look at Cubic Formula -- from Wolfram MathWorld - May 12th 2009, 11:21 AMBabyMilo
I appreciate your help! But I am just making x the subject (like rearranging the equation). Many Thanks!

- May 12th 2009, 07:51 PMmr fantastic
- May 12th 2009, 10:56 PMBabyMilo
- May 13th 2009, 01:34 AMmr fantastic