(a)
To find: The value of discriminant.
(a)
Answer to Problem 20PT
The value of discriminant is
Explanation of Solution
Given information:
The given equation is
Calculation:
Consider the equation
The value of discriminant
Therefore, the value of discriminant is
(b)
To find: The number type of roots.
(b)
Answer to Problem 20PT
The two roots are real and rational number.
Explanation of Solution
Given information: the given information
Calculation:
.
The discriminant obtained in part
(c)
To find: The exact solution of
(c)
Answer to Problem 20PT
The exact value of quadratic equation is
Explanation of Solution
Given information:
The given information is
Calculation:
The exact solution is found below by using
Therefore, the exact value roots are
Chapter 4 Solutions
Glencoe Algebra 2 Student Edition C2014
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