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How to solve an equation in terms of the other variable

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Phil
Phil on 11 Dec 2012
Answered: Jeffery Devereux on 26 Feb 2018
I have the equation g^2+6*g*h+3h=0 for which I need to solve g in terms of h. Here is my attempt:
syms g h
g = solve('g^2+6*g*h+3*h=0')
For some reason this consistently only solves h in terms of g. Can someone point out to me what I am doing wrong?

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Accepted Answer

Walter Roberson
Walter Roberson on 11 Dec 2012
solve() has an algorithm for selecting which variable to solve for when it is not told which one to solve for. The algorithm is based upon the letter the variable name starts with.
You should specify which variable you want solved for:
g = solve('g^2+6*g*h+3*h=0', 'g')

More Answers (1)

Jeffery Devereux
Jeffery Devereux on 26 Feb 2018
you need to use two equal signs
g^2+6*g*h+3*h==0

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