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Quadratic Equations
Graph of Quadratic Function when a>0
Graph of Quadratic Function when a>0
Quadratic Equations
Quadratic Equations
Quadratic equation is of the form y = ax² + bx + c (a, b and c are numbers and a ≠ 0).
Graph of Quadratic Function when a>0
Graph of Quadratic Function when a>0
If a>0, the graph is of U shape.
The graph will have a minimum point
The line of symmetry will pass through the minimum point.
The graph will cross the y-axis at the point c.
Graph of Quadratic Function When a<0
Graph of Quadratic Function When a<0
If a<0, the graph is of inverted – U shape.
The graph will have a maximum point.
The line of symmetry will pass through the maximum point.
The graph will cross the y-axis at the point c.
Quadratic Curve - Interactive
Quadratic Curve - Interactive
Questions
Questions
There are x people in the room. Each person in a room shakes hand with every other person in the room exactly once. The total number of handshakes is 90. Form a quadratic equation in x and solve it to find the number of people in the room.
The cost of a present is $200 and to be shared equally among a group of x friends. When two more friends joined the group, every one paid $5 less. Form a quadratic equation in x and solve it to find the number of friends in the group now.
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