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If alpha and beta are zeros of p(x) = x^...

If `alpha` and `beta` are zeros of `p(x) = x^2 + x - 1`, then find `alpha^(2)beta + alphabeta^(2)`.

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To solve the problem, we need to find the value of \( \alpha^2 \beta + \alpha \beta^2 \) given that \( \alpha \) and \( \beta \) are the zeros of the polynomial \( p(x) = x^2 + x - 1 \). ### Step-by-Step Solution: 1. **Identify the coefficients of the polynomial**: The polynomial is given as \( p(x) = x^2 + x - 1 \). Here, we can identify: - \( a = 1 \) - \( b = 1 \) - \( c = -1 \) 2. **Use Vieta's formulas to find the sum and product of the roots**: According to Vieta's formulas: - The sum of the roots \( \alpha + \beta = -\frac{b}{a} = -\frac{1}{1} = -1 \) - The product of the roots \( \alpha \beta = \frac{c}{a} = \frac{-1}{1} = -1 \) 3. **Rewrite the expression \( \alpha^2 \beta + \alpha \beta^2 \)**: We can factor the expression: \[ \alpha^2 \beta + \alpha \beta^2 = \alpha \beta (\alpha + \beta) \] 4. **Substitute the values of \( \alpha + \beta \) and \( \alpha \beta \)**: From the previous steps, we have: - \( \alpha + \beta = -1 \) - \( \alpha \beta = -1 \) Substituting these values into the factored expression: \[ \alpha^2 \beta + \alpha \beta^2 = \alpha \beta (\alpha + \beta) = (-1)(-1) = 1 \] 5. **Conclusion**: Thus, the value of \( \alpha^2 \beta + \alpha \beta^2 \) is \( 1 \). ### Final Answer: \[ \alpha^2 \beta + \alpha \beta^2 = 1 \]
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