Question

1)What is the possible discriminant of the graph?
Posted below.

A)0
B36
C)–11
D)18




2)What is the possible discriminant of the graph?

Posted below



A)15
B)–13
C)0
D)16

Answer 1

For graph1 you can get the equation because you have the roots (-4 and 2)
Then :
y = (x+4)(x-2)
y= x^2 + 2x - 8
you remember the discriminant of y=ax^2+bx+c is : b^2-4ac
this case a=1,b=2,c=-8
then discriminant = 2^2-4*1*(-8) = 36

Answer 2

the second is the same , you'll be able to do it