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Find the roots of each of the following equations, if they exist, by applying the quadratic formula:
`2sqrt(3)x^(2)-5x+sqrt(3)=0`

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To find the roots of the quadratic equation \(2\sqrt{3}x^2 - 5x + \sqrt{3} = 0\) using the quadratic formula, we will follow these steps: ### Step 1: Identify coefficients We compare the given equation with the standard form of a quadratic equation \(ax^2 + bx + c = 0\). - Here, \(a = 2\sqrt{3}\), \(b = -5\), and \(c = \sqrt{3}\). ### Step 2: Calculate the discriminant The discriminant \(D\) is given by the formula: \[ D = b^2 - 4ac \] Substituting the values of \(a\), \(b\), and \(c\): \[ D = (-5)^2 - 4 \cdot (2\sqrt{3}) \cdot (\sqrt{3}) \] Calculating it step-by-step: \[ D = 25 - 4 \cdot 2\sqrt{3} \cdot \sqrt{3} \] \[ D = 25 - 4 \cdot 2 \cdot 3 \] \[ D = 25 - 24 \] \[ D = 1 \] ### Step 3: Check the nature of the roots Since \(D > 0\), the equation has two distinct real roots. ### Step 4: Apply the quadratic formula The quadratic formula is given by: \[ x = \frac{-b \pm \sqrt{D}}{2a} \] Substituting the values of \(b\), \(D\), and \(a\): \[ x = \frac{-(-5) \pm \sqrt{1}}{2 \cdot (2\sqrt{3})} \] This simplifies to: \[ x = \frac{5 \pm 1}{4\sqrt{3}} \] ### Step 5: Calculate the two roots 1. **First root (using the positive sign)**: \[ x_1 = \frac{5 + 1}{4\sqrt{3}} = \frac{6}{4\sqrt{3}} = \frac{3}{2\sqrt{3}} \] Rationalizing the denominator: \[ x_1 = \frac{3\sqrt{3}}{2 \cdot 3} = \frac{\sqrt{3}}{2} \] 2. **Second root (using the negative sign)**: \[ x_2 = \frac{5 - 1}{4\sqrt{3}} = \frac{4}{4\sqrt{3}} = \frac{1}{\sqrt{3}} \] ### Conclusion The roots of the equation \(2\sqrt{3}x^2 - 5x + \sqrt{3} = 0\) are: \[ x_1 = \frac{\sqrt{3}}{2}, \quad x_2 = \frac{1}{\sqrt{3}} \]
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RS AGGARWAL-QUADRATIC EQUATIONS -Exercise 4C
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