Please help me i don't understand

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1