Quadratic Functions, Equations and Inequalities

Quadratic Functions, Equations and Inequalities

Secondary 3

For \(y=-2(x+1)(x-3),\) find:

  1. all intercepts;

  2. the axis of symmetry and turning point;

  3. the maximum value of \(y\).

Sketch the graph.

Solution:

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Answer:(a) Intercepts \((-1,0),(3,0),(0,6)\); (b) Axis \(x=1\); Vertex \((1,8)\); (c) Maximum \(8\).

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