Question

If a quadratic equation has 2 identical rational roots, how many times will its graph intersect the x-axis?

Answer 1

It'll intersect only once, like this here
the quadratic is
\[x^2+2x+1=0\]
the identical roots are x=-1
it's graph will be

Answer 2

Thanks.

Answer 3

identical roots mean that its a perfect square having only ONEx-value repeated twice, so it'll intersect at only one point

Answer 4

So does it intersect twice at one point or intersect once?

Answer 5

It'd intersect only once. If I make a dot over a dot, then also I'll have only one dot