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Statement-1 : The equation x^(2)-2009x+2...

Statement-1 : The equation `x^(2)-2009x+2008 =0` has rational roots .
and
Statement -2 : The quadratic equation `ax^(2)+bx+c=0` has rational roots iff `b^(2)-4ac` is a prefect square.

A

Statement -1 is True, Statement -2 is True, Statement -2 is a correct explanation for statement -12

B

Statement -1 is True, Statement -2 is True , Statement -2 is NOT a correct explanation for Statement -12

C

Statement -1 is True, Statement -2 is False

D

Statement -1 is Flase, Statement -2 is True

Text Solution

AI Generated Solution

The correct Answer is:
To determine whether the statements are true, we can analyze them step by step. ### Step 1: Analyze Statement 1 We need to check if the quadratic equation \( x^2 - 2009x + 2008 = 0 \) has rational roots. ### Step 2: Use the Quadratic Formula The roots of a quadratic equation \( ax^2 + bx + c = 0 \) can be found using the quadratic formula: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] In our case, \( a = 1 \), \( b = -2009 \), and \( c = 2008 \). ### Step 3: Calculate the Discriminant We need to calculate the discriminant \( D = b^2 - 4ac \): \[ D = (-2009)^2 - 4 \cdot 1 \cdot 2008 \] Calculating \( (-2009)^2 \): \[ D = 2009^2 - 4 \cdot 2008 \] Calculating \( 2009^2 \): \[ 2009^2 = 4036081 \] Calculating \( 4 \cdot 2008 \): \[ 4 \cdot 2008 = 8032 \] Now substituting back: \[ D = 4036081 - 8032 = 4038049 \] ### Step 4: Check if the Discriminant is a Perfect Square Next, we need to check if \( 4038049 \) is a perfect square: \[ \sqrt{4038049} = 2009 \] Since \( 2009^2 = 4038049 \), the discriminant is indeed a perfect square. ### Step 5: Conclusion for Statement 1 Since the discriminant is a perfect square, the roots of the equation are rational. Therefore, Statement 1 is true. ### Step 6: Analyze Statement 2 Statement 2 states that a quadratic equation \( ax^2 + bx + c = 0 \) has rational roots if and only if \( b^2 - 4ac \) is a perfect square. This is a well-known result in algebra. ### Step 7: Conclusion for Statement 2 Since this statement is a standard result in quadratic equations, Statement 2 is also true. ### Final Conclusion Both statements are true, and Statement 1 is a correct explanation of Statement 2.
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