Question

Determine the number of solutions for the quadratic function f(x) = -x2 + 3x - 9?

Answer 1

I said there is none

Answer 2

If by solution you mean roots, then there are 2 imaginary roots.

Answer 3

how is there 2 distinct real solutions...?

Answer 4

just check the discriminant value (D), with D = b^2 - 4ac
if D > 0 then there are 2 distinc real solutions
if D = 0 then there is one real solution (the roots are same)
if D < 0 then there are 2 imaginary solutions (the roots not real)

Answer 5

So it is 2 distinct real solutions! Thanks guys!

Answer 6

no

Answer 7

i didnt say that --"

Answer 8

1 solution with a double root?

Answer 9

if D < 0 then there are 2 imaginary solutions (the roots not real)

Answer 10

f(x) = -x2 + 3x - 9
according information above, a = -1, b = 3, c = -9

D = b^2 - 4ac
D = 3^2 - 4(-1)(-9)
D = 9 - 36
D = -27
that means D < 0
take your conclution, now

Answer 11

I'm confused as pellet right now.


No real solutions
or
1 solution (double root)
or
2 distinct real solutions
or
3 solutions

Answer 12

Those are all my guesses :\

Answer 13

No real solution.

Answer 14

no solution is your case

Answer 15

I was right in the first place. What the...