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The zeroes of the polynomial sqrt3x^2 - ...

The zeroes of the polynomial `sqrt3x^2 - 8x+4sqrt3` are:

A

`2sqrt3,2/sqrt3`

B

`2sqrt3,sqrt3/2`

C

`6sqrt2,3`

D

`3sqrt2,6`

Text Solution

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The correct Answer is:
To find the zeroes of the polynomial \( \sqrt{3}x^2 - 8x + 4\sqrt{3} \), we can use the quadratic formula. The quadratic formula states that for a quadratic equation of the form \( ax^2 + bx + c = 0 \), the roots can be found using: \[ x = \frac{-b \pm \sqrt{D}}{2a} \] where \( D \) is the discriminant given by \( D = b^2 - 4ac \). ### Step 1: Identify coefficients From the polynomial \( \sqrt{3}x^2 - 8x + 4\sqrt{3} \), we identify: - \( a = \sqrt{3} \) - \( b = -8 \) - \( c = 4\sqrt{3} \) ### Step 2: Calculate the discriminant \( D \) Now, we calculate the discriminant \( D \): \[ D = b^2 - 4ac \] \[ D = (-8)^2 - 4(\sqrt{3})(4\sqrt{3}) \] \[ D = 64 - 4(3)(4) \] \[ D = 64 - 48 \] \[ D = 16 \] ### Step 3: Apply the quadratic formula Now that we have \( D = 16 \), we can find the roots using the quadratic formula: \[ x = \frac{-(-8) \pm \sqrt{16}}{2\sqrt{3}} \] \[ x = \frac{8 \pm 4}{2\sqrt{3}} \] ### Step 4: Calculate the two possible values for \( x \) Calculating the two roots: 1. For the positive case: \[ x_1 = \frac{8 + 4}{2\sqrt{3}} = \frac{12}{2\sqrt{3}} = \frac{6}{\sqrt{3}} = 2\sqrt{3} \] 2. For the negative case: \[ x_2 = \frac{8 - 4}{2\sqrt{3}} = \frac{4}{2\sqrt{3}} = \frac{2}{\sqrt{3}} = \frac{2\sqrt{3}}{3} \] ### Conclusion Thus, the zeroes of the polynomial \( \sqrt{3}x^2 - 8x + 4\sqrt{3} \) are: \[ x_1 = 2\sqrt{3}, \quad x_2 = \frac{2\sqrt{3}}{3} \]
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