Find a quadratic polynomial each with the given numbers as the sum and product of zeroes respectively:
Question
Find a quadratic polynomial each with the given numbers as the sum and product of zeroes respectively:
Solution
To find a quadratic polynomial given the sum and product of its zeroes, we can use the standard form of a quadratic polynomial. The general form of a quadratic polynomial is:
The relationships between the coefficients and the zeroes can be expressed as follows:
- The sum of the zeroes is given by .
- The product of the zeroes is given by .
Steps to find the quadratic polynomial
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Define Sum and Product: Let the sum of the zeroes be and the product of the zeroes be .
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Use the relationships: From the above definitions, we have:
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Choose a value for : Typically, we can take for simplicity. This means:
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Construct the polynomial: After determining and , substitute back into the polynomial form.
Example
Let's say the sum of the zeroes is and the product of the zeroes is .
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Given:
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Using the relationships:
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The quadratic polynomial becomes:
Final Answer
The quadratic polynomial with the given sum and product of zeroes is:
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