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Let alpha in R and let alpha,beta be the...

Let `alpha in R` and let `alpha,beta` be the roots of the equation `x^(2)+60^(1/4)x+alpha=0`
If `alpha^(4)+beta^(4)=-30`,then the product of all possible values of `alpha` is

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To solve the problem step-by-step, we start with the given quadratic equation and the conditions provided. ### Step 1: Identify the coefficients from the quadratic equation The quadratic equation given is: \[ x^2 + 60^{1/4} x + \alpha = 0 \] From this, we can identify: - \( a = 1 \) - \( b = 60^{1/4} \) - \( c = \alpha \) ### Step 2: Use Vieta's formulas According to Vieta's formulas, for a quadratic equation \( ax^2 + bx + c = 0 \): - The sum of the roots \( \alpha + \beta = -\frac{b}{a} = -60^{1/4} \) - The product of the roots \( \alpha \beta = \frac{c}{a} = \alpha \) ### Step 3: Express \( \alpha^4 + \beta^4 \) in terms of \( \alpha \) and \( \beta \) We know that: \[ \alpha^4 + \beta^4 = (\alpha^2 + \beta^2)^2 - 2\alpha^2\beta^2 \] We can express \( \alpha^2 + \beta^2 \) using the identity: \[ \alpha^2 + \beta^2 = (\alpha + \beta)^2 - 2\alpha\beta \] Substituting the values from Vieta's formulas: \[ \alpha^2 + \beta^2 = (-60^{1/4})^2 - 2\alpha = 60^{1/2} - 2\alpha \] ### Step 4: Substitute into the expression for \( \alpha^4 + \beta^4 \) Now substituting \( \alpha^2 + \beta^2 \) into the equation for \( \alpha^4 + \beta^4 \): \[ \alpha^4 + \beta^4 = (60^{1/2} - 2\alpha)^2 - 2\alpha^2 \] Expanding this: \[ = 60 - 4\alpha \cdot 60^{1/2} + 4\alpha^2 - 2\alpha^2 \] \[ = 60 - 4\alpha \cdot 60^{1/2} + 2\alpha^2 \] ### Step 5: Set the equation equal to -30 Given that \( \alpha^4 + \beta^4 = -30 \), we set up the equation: \[ 60 - 4\alpha \cdot 60^{1/2} + 2\alpha^2 = -30 \] Rearranging gives: \[ 2\alpha^2 - 4\alpha \cdot 60^{1/2} + 90 = 0 \] ### Step 6: Simplify the quadratic equation Dividing the entire equation by 2: \[ \alpha^2 - 2\alpha \cdot 60^{1/2} + 45 = 0 \] ### Step 7: Find the product of the roots The product of the roots of the quadratic equation \( \alpha^2 + b\alpha + c = 0 \) is given by \( \frac{c}{a} \). Here: - \( c = 45 \) - \( a = 1 \) Thus, the product of all possible values of \( \alpha \) is: \[ \text{Product of roots} = 45 \] ### Final Answer The product of all possible values of \( \alpha \) is \( 45 \). ---
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