For the quadratic equation ax + bx +c = 0, the discriminant is D = The discriminant tells us how many real solutions a quadratic equation has. If D> 0, the equation has -Select- If D = 0, the equation has If D< 0, the equation has v real solution(s). Select--- V real solution(s). Select-V real solution(s).

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### Determining the Number of Real Solutions of a Quadratic Equation Using the Discriminant

For the quadratic equation \( ax^2 + bx + c = 0 \), the discriminant is \( D = \). The discriminant tells us how many real solutions a quadratic equation has.

- If \( D > 0 \), the equation has \( \text{Select} \) real solution(s).
- If \( D = 0 \), the equation has \( \text{Select} \) real solution(s).
- If \( D < 0 \), the equation has \( \text{Select} \) real solution(s).
  
### Explanation

The discriminant of a quadratic equation \( ax^2 + bx + c \) is found using the formula:

\[ D = b^2 - 4ac \]

The value of \( D \) determines the nature and number of the solutions:

- **When \( D > 0 \)**: There are two distinct real solutions.
- **When \( D = 0 \)**: There is exactly one real solution (a repeated or double root).
- **When \( D < 0 \)**: There are no real solutions; instead, there are two complex conjugate solutions.

### Practical Application

To use the discriminant effectively, identify the coefficients \( a \), \( b \), and \( c \) from the quadratic equation \( ax^2 + bx + c = 0 \). Substitute these values into the discriminant formula \( D = b^2 - 4ac \) and evaluate \( D \). Based on the value of \( D \):

- Use the criteria outlined above to determine the number of real solutions.
- For example, if the discriminant \( D \) is positive, you can conclude that there are two real solutions.

This method provides a quick way to understand the nature of the roots of the quadratic equation without solving it completely.
Transcribed Image Text:### Determining the Number of Real Solutions of a Quadratic Equation Using the Discriminant For the quadratic equation \( ax^2 + bx + c = 0 \), the discriminant is \( D = \). The discriminant tells us how many real solutions a quadratic equation has. - If \( D > 0 \), the equation has \( \text{Select} \) real solution(s). - If \( D = 0 \), the equation has \( \text{Select} \) real solution(s). - If \( D < 0 \), the equation has \( \text{Select} \) real solution(s). ### Explanation The discriminant of a quadratic equation \( ax^2 + bx + c \) is found using the formula: \[ D = b^2 - 4ac \] The value of \( D \) determines the nature and number of the solutions: - **When \( D > 0 \)**: There are two distinct real solutions. - **When \( D = 0 \)**: There is exactly one real solution (a repeated or double root). - **When \( D < 0 \)**: There are no real solutions; instead, there are two complex conjugate solutions. ### Practical Application To use the discriminant effectively, identify the coefficients \( a \), \( b \), and \( c \) from the quadratic equation \( ax^2 + bx + c = 0 \). Substitute these values into the discriminant formula \( D = b^2 - 4ac \) and evaluate \( D \). Based on the value of \( D \): - Use the criteria outlined above to determine the number of real solutions. - For example, if the discriminant \( D \) is positive, you can conclude that there are two real solutions. This method provides a quick way to understand the nature of the roots of the quadratic equation without solving it completely.
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