To analyse: A given quadratic equation, using discriminant.
The object will reach 90 ft above the ground at
Given data: An object propelled straight upward with initial speed
Method/Formula used:
The solutions of quadratic equation
Calculation:
The height h reached in t seconds is modelled as,
Here, to find that the object ever reach at height 90 ft.
Substitute 90 for h in equation (1), and find t using discriminant as:
OR
Compare equation (2), with
Since, the discriminant for the equation (2)
The solutions of equation (2) are:
Thus, the object will be 90 ft above the ground at
Chapter 4 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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