Question

9.05] Identify the graph of a quadratic equation with two identical rational solutions.

Answer 1

These are the 4 possible answer, in .jpg format.

Answer 2

got to be third one

Answer 3

if they are identical it is a perfect square and must touch the x - axis, not cross it

Answer 4

i other words it has to look like
\[y=a(x+\frac{b}{2a})^2\] with vertex at
\[(-\frac{b}{2a},0)\]