Question

check my answer? medal for best

Answer 1

I know its either C or D but I cant be sure of which

Answer 2

C and D have discriminants that are negative numbers

remember if a discriminant is negative, then there are no real solutions (ie no x intercepts)

Answer 3

if a discriminant is positive, then there are 2 real solutions

if a discriminant is zero, then there is exactly one real solution

Answer 4

Yea, you will have one solution of x therefore one x intercept

Answer 5

@jim_thompson5910 it would be the second one right?

Answer 6

correct

Answer 7

the first one has 2 x-intercepts, so the discriminant is positive (and not zero)

Answer 8

oh so if a discriminant is zero, then the parabola only touches x once, yes?

Answer 9

exactly

Answer 10

oh okay thanks!

Answer 11

you're welcome