A. Quadratic Formula x =
- Determine the values of a, b, c.
- Substitute the values into the formula.
- Simplify using order of operations
- Once simplified, for the ±, set up one equation with "+" and another with "-".
- These x-values are the solutions AND are the x-intercepts of the graph.
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B. Discriminant - it's the (b² - 4ac) in the quadratic formula
- The value of (b2 - 4ac) tells how many solutions or x-intercepts the quadratic equation will have.
- If (b² - 4ac) > 0, there are two real solutions or x-intercepts
- If (b² - 4ac) = 0, there is one real solution or x-intercept.
- If (b² - 4ac) < 0, there are no real solutions or x-intercepts.
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