Example 1
Find the maximum or minimum value of each of the following quadratic function by completing the squares. In each case, state the value of x at which the function is maximum or minimum. And also, state the maximum or minimum point and axis of symmetry for each case.
(a)
(b)
(c)
(d)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2013/05/Picture6.png)
Find the maximum or minimum value of each of the following quadratic function by completing the squares. In each case, state the value of x at which the function is maximum or minimum. And also, state the maximum or minimum point and axis of symmetry for each case.
(a)
(b)
(c)
(d)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2013/05/Picture6.png)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2013/05/Picture7.png)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2013/05/Picture8.png)
![](http://spmaddmaths.blog.onlinetuition.com.my/wp-content/uploads/sites/3/2013/05/Picture9.png)