Question

Which of the following represents a function () = 2 + + with 2 real solutions and > 0 ?

Answer 1

b and c

Explanation:

The solutions to a quadratic equation are the points on the x- axis where the graph crosses.

For 2 real solutions there must be 2 points of intersection with the x- axis.

Graphs a and d do not cross the x- axis and therefore have no real solutions.

Both graphs b and c cross the x- axis at 2 unique points and therefore have 2 real solutions.