So basically a quadratic equation is a polynomial whose highest degree is 2. Decompose the constant term -15 into two factors such that the product of the two factors is equal to -15 and the addition of two factors is equal to the coefficient of x that is 2. 2x 1 x - 5 0.
Then we plug these coefficients in the formula.
Use the quadratic formula to find the solutions. So basically a quadratic equation is a polynomial whose highest degree is 2. This video shows an animated guide to simplifying quadratic expressions and equations by completing the square. X 02 or 1.