Question

PLEASE HELP!!
What is the possible discriminant of the graph?

0
16
–13
15

Answer 1

what is a discriminant?

Answer 2

it's b²-4ac?

Answer 3

http://en.wikipedia.org/wiki/Discriminant

Answer 4

so se have (X+7).(X+3)

Answer 5

can you find it now?

Answer 6

no, i have no idea what to do

Answer 7

the equation of that graph is(x+7).(x+3)=x²+10.x+21

Answer 8

so delta =16

Answer 9

okay, well im telling you, i suck at math, and i am still clueless... how did you get that? can you explain it so i can learn

Answer 10

-7 and - 3 are roots of the grapg
so we can write this in that form,if you put a -7 in our equation that will give us a zero
(-7+7).(-7+3)=0

Answer 11

ohhhh

Answer 12

get it?

Answer 13

yeah, actually I do, thank you