Questions: Put the steps in order to solve a quadratic inequality:
First
Get the inequality in standard form
Factor
Identify the critical points
Express the solution
Test the intervals
Determine the solution
Last
Transcript text: Put the steps in order to solve a quadratic inequality:
First
Get the inequality in standard form
Factor
Identify the critical points
Express the solution
Test the intervals
Determine the solution
Last
Solution
Solution Steps
To solve a quadratic inequality, follow these steps: First, get the inequality in standard form. Then, factor the quadratic expression. Identify the critical points by setting each factor equal to zero. Test the intervals determined by these critical points to see where the inequality holds true. Finally, express the solution based on the intervals that satisfy the inequality.
To solve a quadratic inequality, we need to follow a series of logical steps. Here is the correct order of steps with a brief summary of each:
Step 1: Get the inequality in standard form
First, ensure that the quadratic inequality is in the standard form, which is \( ax^2 + bx + c \leq 0 \), \( ax^2 + bx + c \geq 0 \), \( ax^2 + bx + c < 0 \), or \( ax^2 + bx + c > 0 \).
Step 2: Factor
Next, factor the quadratic expression on one side of the inequality, if possible. This will help in identifying the critical points.
Step 3: Identify the critical points
Determine the critical points by setting the factored expression equal to zero and solving for the variable. These points are where the expression changes sign.
Step 4: Test the intervals
Use the critical points to divide the number line into intervals. Test a point from each interval in the original inequality to determine whether the inequality holds in that interval.
Step 5: Express the solution
Based on the test results, express the solution as a union of intervals where the inequality is satisfied.
Step 6: Determine the solution
Finally, write down the solution set, considering whether the inequality is strict (\(<\) or \(>\)) or inclusive (\(\leq\) or \(\geq\)).
Final Answer
The correct order of steps to solve a quadratic inequality is: