You can put this solution on YOUR website!
If a quadratic equation has solutions, the quadratic expression part of the equation can be written as a product of two binomial factors and a number
are the solutions.
When those solutions are integers, you may be able to solve the equation by factoring.
If the two solutions are the same, you have
That formula represents all the quadratic equations that have only
as a solution. There are infinitely many of them, because there are infitely many values that you can choose for
, you can write
and is equivalent to
which is probably the expected answer.