Concept explainers
a)
To evaluate: the solutions of
a)
Answer to Problem 3P
The solution of above system of equations is (3, 8) and (−1, 4).
Explanation of Solution
Given:
Using the quadratic formula,
From the equation,
Using quadratic formula to solve above
So, the solution of equation is x = −7.
b)
To explain: the reason why quadratic equations of the form
b)
Explanation of Solution
Given:
Using the discriminant formula,
From the equation,
Using quadratic formula to solve above quadratic equation,
It can be seen that the value of discriminant is zero.
It is known that when the value of discriminant is zero, then quadratic equation will have one real-number solution.
Similarly,
From the equation,
Using quadratic formula to solve above quadratic equation,
It can be seen that the value of discriminant is zero.
It is known that when the value of discriminant is zero, then quadratic equation will have one real-number solution.
Chapter 9 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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