The quadratic formula is x - b b2 - 4 ac2a It is important in algebra where it is used to calculate the roots of quadratic equations. X 6 36 20 10. An expression like x 4 is a polynomial.
If a 0 then the equation is linear not quadratic as there is no ax² term.
An expression like x 4 is a polynomial. X 02 or 1. X b b2 4ac 2a. A quadratic equation has two solutions called roots.