Question

If an equation has a discriminant of zero, how many times will the graph touch the x–axis?

0

1

2

3

Answer 1

A standard quadratic is of the form
\[ax^2+bx+c=0\]
discriminant is \(b^2-4ac\)
if it's zero then there is only one root which repeat itself. So what do you think is the answer?

Answer 2

@kenbaby ???