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If alphaandbeta are the zeroes of a poly...

If `alphaandbeta` are the zeroes of a polynomial `x^(2)-4sqrt(3)x+3`,then find the value of `alpha+beta-alphabeta`.

A

`4sqrt(3)-3`

B

`sqrt(3)-3`

C

`-3-4sqrt(3)`

D

`4sqrt(3)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we need to find the value of \( \alpha + \beta - \alpha \beta \), where \( \alpha \) and \( \beta \) are the zeros of the polynomial \( x^2 - 4\sqrt{3}x + 3 \). ### Step-by-step Solution: 1. **Identify the coefficients of the polynomial**: The polynomial is given as \( x^2 - 4\sqrt{3}x + 3 \). Here, we can identify: - \( a = 1 \) (coefficient of \( x^2 \)) - \( b = -4\sqrt{3} \) (coefficient of \( x \)) - \( c = 3 \) (constant term) 2. **Calculate \( \alpha + \beta \)**: The sum of the roots \( \alpha + \beta \) can be calculated using the formula: \[ \alpha + \beta = -\frac{b}{a} \] Substituting the values of \( b \) and \( a \): \[ \alpha + \beta = -\frac{-4\sqrt{3}}{1} = 4\sqrt{3} \] 3. **Calculate \( \alpha \beta \)**: The product of the roots \( \alpha \beta \) can be calculated using the formula: \[ \alpha \beta = \frac{c}{a} \] Substituting the values of \( c \) and \( a \): \[ \alpha \beta = \frac{3}{1} = 3 \] 4. **Calculate \( \alpha + \beta - \alpha \beta \)**: Now, we need to find \( \alpha + \beta - \alpha \beta \): \[ \alpha + \beta - \alpha \beta = 4\sqrt{3} - 3 \] 5. **Final Answer**: Therefore, the value of \( \alpha + \beta - \alpha \beta \) is: \[ \boxed{4\sqrt{3} - 3} \]
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