1. Be able to use quadratic function graphs to find approximate solutions of functions <br>2. Use quadratic functions to solve simple practical problems-seeking the most value problem
1. The approximate solution of the function will be solved by the secondary function image.<br>2. Use secondary functions to solve simple practical problems - find the most value problem.
1. Be able to use the image of quadratic function to find the approximate solution of function<br>2. Using quadratic function to solve a simple practical problem the problem of finding the maximum value<br>