<p>If the quadratic function faces downwards, has max. ponit at f(2). and f(x)=0, what could be a?
-1
0
2
3
4</p>
<p>and why??????? Thanks !!!!</p>
<p>-1, because if the quadratic faces downward, A must be negative.</p>
<p>thanks learned that really spaced out~~~~hope that doesnt occur on may 6 or else well....an insane version of me will have to be maintained until the next testing date..sry 2 all my suffering frens..pray that i can return to the normal living after may 6!!!</p>