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Write a quadratic polynomial whose sum o...

Write a quadratic polynomial whose sum of zeros is `( -1/4 )` and product of zeros is `( 1/4 ) `

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To find a quadratic polynomial whose sum of zeros is \(-\frac{1}{4}\) and product of zeros is \(\frac{1}{4}\), we can follow these steps: ### Step 1: Understand the standard form of a quadratic polynomial The standard form of a quadratic polynomial is given by: \[ f(x) = ax^2 + bx + c \] where \(a\), \(b\), and \(c\) are constants. ### Step 2: Use the relationship between the coefficients and the zeros For a quadratic polynomial with roots \(\alpha\) and \(\beta\): - The sum of the roots \(\alpha + \beta = -\frac{b}{a}\) - The product of the roots \(\alpha \beta = \frac{c}{a}\) Given: - Sum of zeros \(\alpha + \beta = -\frac{1}{4}\) - Product of zeros \(\alpha \beta = \frac{1}{4}\) ### Step 3: Set \(a = 1\) for simplicity Assuming \(a = 1\), we can express \(b\) and \(c\) in terms of the sum and product of the roots: - From the sum of roots: \[ -\frac{b}{1} = -\frac{1}{4} \implies b = \frac{1}{4} \] - From the product of roots: \[ \frac{c}{1} = \frac{1}{4} \implies c = \frac{1}{4} \] ### Step 4: Write the polynomial using the values of \(b\) and \(c\) Substituting \(a\), \(b\), and \(c\) into the polynomial: \[ f(x) = 1x^2 + \frac{1}{4}x + \frac{1}{4} \] This simplifies to: \[ f(x) = x^2 + \frac{1}{4}x + \frac{1}{4} \] ### Step 5: Eliminate the fraction by multiplying through by 4 To eliminate the fractions, multiply the entire polynomial by 4: \[ 4f(x) = 4(x^2 + \frac{1}{4}x + \frac{1}{4}) = 4x^2 + x + 1 \] ### Final Answer Thus, the required quadratic polynomial is: \[ \boxed{4x^2 + x + 1} \]
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