Question

The graph of a certain quadratic function does not cross the x-axis. Which of the following are possible values for the discriminant? check all that apply.

a) 18
b) 0
c) -25
d) -7

Answer 1

this is something that ppl should remember about quadratic functions:
discriminant>0 : two solutions
discriminant=0 : one solution
discriminant<0 : no solution.

therefore your answer is c) and d).

Answer 2

thank you !

Answer 3

really memorize it :p!

Answer 4

i will, i added that to my notes (:

Answer 5

=)