The ''U'' shaped graph of a quadratic is called a parabola. A quadratic equation has two solutions. Either two distinct real solutions, one double real solution or two imaginary solutions.
All methods start with setting the equation equal to zero.
Solve for x in the following equation. Factoring The left side of the equation is not easily factored, so we will not use this method. Completing the Square Subtract 15 from both sides of the equation . In the equation , a is the coefficient of the term, b is the coefficient of the x term, and c is the constant. So what you will be looking for is where the graph of crosses the x-axis.