
Concept explainers
To describe: The correct roots of the polynomial

Answer to Problem 79HP
Morgan calculated the roots correctly.
Explanation of Solution
Given information:
The roots of polynomial
Consider the factorization of polynomial
When Gwen did the calculations in the third step, he took a negative sign common so, sign will change in the parenthesis.
On the other hand Morgan did the correct calculations. He split the middle term and then applied the zero property.
Recall that to factor a polynomial split the middle term in such a way that sum of two numbers is the middle term and product of two numbers is same is product of first and last term.
For the above polynomial
Apply it, first the group the similar terms,
Apply the zero property,
Either
Therefore,
Chapter 5 Solutions
Algebra 2
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