Question

Determine the number and type of solutions for x2 + 9x + 7 = 0

Answer 1

can you determine the discriminant for me?

Answer 2

o, idk what that is...

Answer 3

in the equation \(\large ax^2+bx+c=0 \), the discriminant is \(\large D=b^2-4ac \)
so in your equation \(\large x^2+9x+7=0 \), identify a, b, and c and plug it into that formula..:)

Answer 4

what did you get for D= ?

Answer 5

is it two rational?

Answer 6

why do you say that?

Answer 7

because it dosnt come up with any - and i thought negatives were irrational, and it isnt a 0 so i figured its rational!

Answer 8

yep... you're correct

Answer 9

yeah, it's positive so there are 2 real solutions

Answer 10

r u sure, is it that or two complex??

Answer 11

if D is negative, you have complex roots
if D is positive, you have real roots
if D=0 you have 1 real root