It tells you what values of x give a result of zero. Graphically, they represent the x-intercepts. It might tell you after how many seconds a ball hits the ground after being thrown in the air.
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It is finding the values of the variable that make the quadratic equation true.
By using the quadratic equation formula or by completing the square
Because when your solving a quadratic equation your looking for x-intercepts which is where why equals 0 and x equals what ever the answer is.
The 1st step would have been to show a particular quadratic equation in question.
Trywww.mathsisfun.com/quadratic-equation-solver.html