Question

A quadratic equation has exactly one real number solution. Which is the value of its discriminant? −1 0 1 2

Answer 1

Answer:

its 0

Step-by-step explanation:

Answer 2

Answer:

The correct answer option is 0.

Step-by-step explanation:

We know the quadratic formula that we use to find the roots of a quadratic equation:

$\frac{-b+-\sqrt{b^2-4ac} } {2a}$

The discriminant in this formula is the part underneath the square root symbol i.e. b^2-4ac.

For a quadratic equation to have exactly one real number solution, the discriminant must be zero.

As we can see the + and - sign appearing before the discriminant here so for one real number solution, these plus and minus signs need to be removed which can only happen if we have a value of zero.