Question

Can you please help me solve question 23?

Answer 1

\[(2,0),(3,-2),(1,-2)\] too bad cause @amistre64 has a snappy way of doing this
not me
just grind it til you find it
\[ax^2+bx+c\] and get three equations with three unknowns

Answer 2

\[4a+2b+c=0\] is one of them

Answer 3

\[9a+3b+c=-2\] is another and
\[a+b+c=-2\] is the third

Answer 4

I have that. where do i go from there?