Quadratic Equations | quadratic formula
AnexampleofaQuadraticEquation:Thefunctionmakesnicecurveslikethisone:NameThenameQuadraticcomesfrom"quad"meaningsquare,becausethevariablegetssquared[1](likex2).Itisalsocalledan"EquationofDegree[2]2"(becauseofthe"2"onthex)StandardFormTheStandardFormofaQuadraticEquationlookslikethis:a,bandcareknownvalues.acantbe0."x"isthevariable[3]orunknown(wedontknowityet). Herearesomeexamples:2x2+5x+3=0 Inthisonea=2,b=5andc=3 x2−3x=0 Thisoneisalittlemoretricky:Whereisa?Wella=1,aswedontusuallywrite"1x2"b=−3...
An example of a Quadratic Equation:
The function makes nice curves like this one:
NameThe name Quadratic comes from "quad" meaning square, because the variable gets squared[1] (like x2).
It is also called an "Equation of Degree[2] 2" (because of the "2" on the x)
Standard FormThe Standard Form of a Quadratic Equation looks like this:
a, b and c are known values. a cant be 0. "x" is the variable[3] or unknown (we dont know it yet).
Here are some examples:
2x2 + 5x + 3 = 0 In this one a=2, b=5 and c=3 x2 − 3x = 0 This one is a little more tricky: Where is a? Well a=1, as we dont usually write "1x2" b = −3 ...