Use FOIL to remove a pair of brackets then simplify ... expression Completing the square is a method used to solve quadratic equations that will not factorise. Simplifying algebraic fractions ...

What type of roots the equation has can be shown by the discriminant. The discriminant for a quadratic equation \(a{x^2} + bx + c = 0\) is \({b^2} - 4ac\). And the types of root the equation has ...