Erasing x^2 in a cubic equation.
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Try to find $\displaystyle a$ such that, if you replace $\displaystyle x$ by $\displaystyle y-a$ and expand, the coefficient in front of $\displaystyle y^2$ is zero.
Originally Posted by ardam Erasing x^2 in a cubic equation. If you have $\displaystyle x^3 + ax^2+bx+c = 0$ let $\displaystyle y = x + \frac{a}{3}$. That should remove the $\displaystyle x^2$ term.
cheers for the help
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