You are not required to memorize it. You can always look it up if necessary. Also, there are other methods to get roots that are more amenable to computation, these should be used when possible.

]]>It is not easy to remember all this formula, few formula we can remember because there are some formulas which are like some basic formulas which we can use sometimes.

]]>The quadratic formula solves quadratics, the quartic, quartics.

]]>You never see the 4 roots of a quartic given in terms of its coefficients. Here it is:

The roots now are:

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