Answers

2014-06-17T12:31:18+05:30
The graph of the quadriatic eqn opens up when the leading coefficient a>0. in this case vertex is the minimum point on the graph and no other value og y is lower than this.

the graph of the quadriatic eqn opens down if the leading coefficient a<0. in this case the vertex is the maximum point on the graph and no other value of y is larger than this. 
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