Question

What is the possible discriminant of the graph?

Answer 1

-15
zero
17
25

Answer 2

ok

Answer 3

discriminant is b^2-4(a)(c) (when looking at ax^2+bx+c)

Answer 4

but i am not given the equation itself

Answer 5

yes, but are given the graph of t. Write the equation from the graph and do it.

Answer 6

how do i write it when i am only given the points

Answer 7

help me

Answer 8

well to narrow down your answer choices a bit, the discriminant would have to be positive. if the discriminant of a quadratic is negative, then only imaginary solutions exist. If the discriminant is 0, then there is only one real solution. If the discriminant is positive, then there are 2 real solutions. Since your graph crosses the x axis twice there are two real solutions and therefore the discriminant must be positive

Answer 9

-15 zero 17 25

Answer 10

these are the ptions

Answer 11

and i just got rid of two of them ;)

Answer 12

yup

Answer 13

now what about last 2

Answer 14

i think we need to find the discriminant discriminant is b^2-4(a)(c) (when looking at ax^2+bx+c) but i dont know how bring it in this form

Answer 15

well, its a little tough because they give you very ugly roots as points... but from those roots, you can solve for the equation of the quadrative. y=0 when x =-4.56... and when x=-.438
so if you wanted to, you could say 0 = (x+4.56...)*(x+.438...) and simplify. thats assuming your A term is 1, though its a bit hard to tell from that graph

Answer 16

its 17 i got it thanks for the help

Answer 17

No problem :)