Question

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

Answer 1

find
\[D = b^2 - 4ac\]

Answer 2

if

\[D>0\]
2 real roots

\[D = 0\]

1 real root

\[D<0\]

no real root

Answer 3

@terenzreignz correct :)

Answer 4

redundant and it had a typo, yours is better :P

Answer 5

thankx