can some one plain to me the quadratic formula?

Question

beginnersmind · Answer

You mean explain how to use it? For example if you have
$$x^{2}-x-6=0$$
how do you use the quadratic formula to find the solution?

anonymous · Answer

The quadratic formula is a formula that gives the roots of a quadratic equation. This is the formula:

x=(−b±b2−4ac−−−−−−−√)/(2a)


If you have an equation, 

ax2+bx+c


you would use the corresponding numerals in the quadratic equation to plug into the formula.

For instance:

$$x ^{2}+4x+3$$

precal · Answer

Quadratic formula finds the two solutions that you are looking for.  Factoring does not always work but the formula works 100% of the time.

precal · Answer

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