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| | Ed is what individuals contact me and my spouse doesn't like it at all. Her family lives in Ohio. Doing ballet is something she would by no means give up. Office supervising is what she does for a residing.<br><br>Also visit my blog real psychic readings ([http://www.Indosfriends.com/profile-253/info/ indosfriends.com]) |
| {{Portal:Mathematics/Feature article|img=Polynomialdeg2.png|img-cap=The graph of a [[real number|real-valued]] quadratic function of a real variable ''x'', is a [[parabola]].|img-cred=[[User:Enochlau|Enoch Lau]]|more=Quadratic equation|desc=A '''quadratic equation''' is a [[polynomial]] [[equation]] of [[degree of a polynomial|degree]] two. The general form is
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| :<math>ax^2+bx+c=0,\,\!</math>
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| where ''a'' ≠ 0 (if ''a'' = 0, then the equation becomes a [[linear equation]]). The letters ''a'', ''b'', and ''c'' are called [[coefficient]]s: the quadratic coefficient ''a'' is the coefficient of ''x''<sup>2</sup>, the linear coefficient ''b'' is the coefficient of ''x'', and ''c'' is the [[constant]] coefficient, also called the ''free term''.
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| Quadratic equations are called ''quadratic'' because ''quadratus'' is [[Latin]] for "square"; in the leading term the variable is [[square (algebra)|squared]].
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| A quadratic equation has two (not necessarily distinct) solutions, which may be [[real number|real]] or [[complex number|complex]], given by the '''quadratic formula''':
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| :<math>x = \frac{-b \pm \sqrt {b^2-4ac}}{2a},</math>
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| These solutions are [[root (mathematics)|''roots'']] of the corresponding [[quadratic function]]
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| :<math>f(x) = ax^2+bx+c.\,</math>|class={{{class}}}}}
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Latest revision as of 07:14, 11 January 2015
Ed is what individuals contact me and my spouse doesn't like it at all. Her family lives in Ohio. Doing ballet is something she would by no means give up. Office supervising is what she does for a residing.
Also visit my blog real psychic readings (indosfriends.com)