X2+2x+1=0 solve equation This equationIn algebra, a quadratic equation (from the Latin quadratus for "square") is any equation having the form{\displaystyle ax^{2}+bx+c=0}where x represents an unknown

X2+2x+1=0 solve equation 

This equation

In algebra, a quadratic equation (from the Latin quadratus for "square") is any equation having the form

{\displaystyle ax^{2}+bx+c=0}

where x represents an unknown, and a, b, and c represent known numbers such that a is not equal to 0. If a = 0, then the equation is linear, not quadratic. The numbers a, b, and c are the coefficients of the equation, and may be distinguished by calling them, respectively, the quadratic coefficient, the linear coefficient and the constant or free term.[1]

Because the quadratic equation involves only one unknown, it is called "univariate". The quadratic equation only contains powers of xthat are non-negative integers, and therefore it is a polynomial equation, and in particular it is a second degree polynomial equation since the greatest power is two.