Solving Quadratic Inequality
- The solution of the quadratic inequalities are the ranges of values which satisfied the inequalities itself.
- There are 2 methods to solve the inequalities.
- Graph method
- Number line method
Step to solve a Quadratic Inequalities
Step 1 : Rewrite the inequality with zero on one side and make sure a > 0
Step 2 : Find where it crosses the x-axis (Put y = 0)
Step 3 : Sketch the graph and shade the region to find the range of values of x
Step 1 : Rewrite the inequality with zero on one side and make sure a > 0
Step 2 : Find where it crosses the x-axis (Put y = 0)
Step 3 : Sketch the graph and shade the region to find the range of values of x
Example
Find the range of values of x for each of the following :
(a)
(b)
Revision – Linear Inequality
Solving Quadratic Inequality – Graph Method
Solving Quadratic Inequality – Number Line Method
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