Question: For the quadratic equation x^2 + 6x + 9 = 0, what is the nature of the roots?
Options:
Two distinct real roots
One real root
No real roots
Complex roots
Correct Answer: One real root
Solution:
The discriminant is 0, indicating one real root (a repeated root).
For the quadratic equation x^2 + 6x + 9 = 0, what is the nature of the roots?
Practice Questions
Q1
For the quadratic equation x^2 + 6x + 9 = 0, what is the nature of the roots?
Two distinct real roots
One real root
No real roots
Complex roots
Questions & Step-by-Step Solutions
For the quadratic equation x^2 + 6x + 9 = 0, what is the nature of the roots?
Step 1: Identify the quadratic equation, which is in the form ax^2 + bx + c. Here, a = 1, b = 6, and c = 9.
Step 2: Calculate the discriminant using the formula D = b^2 - 4ac.
Step 3: Substitute the values of a, b, and c into the discriminant formula: D = (6)^2 - 4(1)(9).
Step 4: Calculate (6)^2, which is 36.
Step 5: Calculate 4(1)(9), which is 36.
Step 6: Now, subtract the two results: D = 36 - 36 = 0.
Step 7: Interpret the discriminant: Since D = 0, this means there is one real root (a repeated root).
Quadratic Equation – A polynomial equation of the form ax^2 + bx + c = 0, where a, b, and c are constants.
Discriminant – The value calculated as b^2 - 4ac, which determines the nature of the roots of a quadratic equation.
Nature of Roots – The classification of the roots of a quadratic equation based on the discriminant: two distinct real roots, one real repeated root, or two complex roots.
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