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Find zeroes of the given quadratic polyn...

Find zeroes of the given quadratic polynomials and verify the relation between zeroes and coefficients :
`x^(2)+2sqrt(2)x-6`

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To find the zeroes of the quadratic polynomial \( p(x) = x^2 + 2\sqrt{2}x - 6 \) and verify the relation between the zeroes and coefficients, we can follow these steps: ### Step 1: Identify coefficients The standard form of a quadratic polynomial is given by: \[ p(x) = ax^2 + bx + c \] From the polynomial \( p(x) = x^2 + 2\sqrt{2}x - 6 \), we can identify: - \( a = 1 \) - \( b = 2\sqrt{2} \) - \( c = -6 \) ### Step 2: Calculate the discriminant The discriminant \( D \) is calculated using the formula: \[ D = b^2 - 4ac \] Substituting the values of \( a \), \( b \), and \( c \): \[ D = (2\sqrt{2})^2 - 4 \cdot 1 \cdot (-6) \] Calculating further: \[ D = 8 + 24 = 32 \] ### Step 3: Find the zeroes using the quadratic formula The zeroes (roots) of the quadratic polynomial are given by: \[ x = \frac{-b \pm \sqrt{D}}{2a} \] Substituting the values of \( b \), \( D \), and \( a \): \[ x = \frac{-2\sqrt{2} \pm \sqrt{32}}{2 \cdot 1} \] Since \( \sqrt{32} = 4\sqrt{2} \), we can write: \[ x = \frac{-2\sqrt{2} \pm 4\sqrt{2}}{2} \] This simplifies to: \[ x = \frac{(-2\sqrt{2} + 4\sqrt{2})}{2} \quad \text{and} \quad x = \frac{(-2\sqrt{2} - 4\sqrt{2})}{2} \] Calculating these gives: \[ x_1 = \frac{2\sqrt{2}}{2} = \sqrt{2} \quad \text{and} \quad x_2 = \frac{-6\sqrt{2}}{2} = -3\sqrt{2} \] ### Step 4: Verify the relation between zeroes and coefficients The sum of the roots \( \alpha + \beta \) is given by: \[ \alpha + \beta = -\frac{b}{a} = -\frac{2\sqrt{2}}{1} = -2\sqrt{2} \] Calculating the sum of the roots we found: \[ \sqrt{2} + (-3\sqrt{2}) = -2\sqrt{2} \] This confirms the sum of the roots. The product of the roots \( \alpha \beta \) is given by: \[ \alpha \beta = \frac{c}{a} = \frac{-6}{1} = -6 \] Calculating the product of the roots we found: \[ \sqrt{2} \cdot (-3\sqrt{2}) = -3 \cdot 2 = -6 \] This confirms the product of the roots. ### Conclusion Thus, we have found the zeroes of the polynomial \( p(x) = x^2 + 2\sqrt{2}x - 6 \) to be \( \sqrt{2} \) and \( -3\sqrt{2} \), and verified the relations: - Sum of the roots: \( -2\sqrt{2} \) - Product of the roots: \( -6 \)

To find the zeroes of the quadratic polynomial \( p(x) = x^2 + 2\sqrt{2}x - 6 \) and verify the relation between the zeroes and coefficients, we can follow these steps: ### Step 1: Identify coefficients The standard form of a quadratic polynomial is given by: \[ p(x) = ax^2 + bx + c \] From the polynomial \( p(x) = x^2 + 2\sqrt{2}x - 6 \), we can identify: ...
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NAGEEN PRAKASHAN ENGLISH-POLYNOMIALS-Exercise 2a
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