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In each question, two equations numbered...

In each question, two equations numbered I and II have been given. You have to solve both the equations and mark the appropriate option.
I.`2x^2 +7x +5=0`
II. `3y^2+5y+2=0`

A

`x lt y`

B

`x gt y`

C

`x le y`

D

`x ge y`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given equations step by step, we will start with each quadratic equation separately. ### Step 1: Solve the first equation \(2x^2 + 7x + 5 = 0\) 1. **Identify the coefficients**: - Here, \(a = 2\), \(b = 7\), and \(c = 5\). 2. **Use the quadratic formula**: The quadratic formula is given by: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] 3. **Calculate the discriminant**: \[ b^2 - 4ac = 7^2 - 4 \cdot 2 \cdot 5 = 49 - 40 = 9 \] 4. **Calculate the roots**: \[ x = \frac{-7 \pm \sqrt{9}}{2 \cdot 2} = \frac{-7 \pm 3}{4} \] - For \(x_1\): \[ x_1 = \frac{-7 + 3}{4} = \frac{-4}{4} = -1 \] - For \(x_2\): \[ x_2 = \frac{-7 - 3}{4} = \frac{-10}{4} = -\frac{5}{2} \] 5. **Roots of the first equation**: \[ x = -1 \quad \text{and} \quad x = -\frac{5}{2} \] ### Step 2: Solve the second equation \(3y^2 + 5y + 2 = 0\) 1. **Identify the coefficients**: - Here, \(a = 3\), \(b = 5\), and \(c = 2\). 2. **Use the quadratic formula**: \[ y = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] 3. **Calculate the discriminant**: \[ b^2 - 4ac = 5^2 - 4 \cdot 3 \cdot 2 = 25 - 24 = 1 \] 4. **Calculate the roots**: \[ y = \frac{-5 \pm \sqrt{1}}{2 \cdot 3} = \frac{-5 \pm 1}{6} \] - For \(y_1\): \[ y_1 = \frac{-5 + 1}{6} = \frac{-4}{6} = -\frac{2}{3} \] - For \(y_2\): \[ y_2 = \frac{-5 - 1}{6} = \frac{-6}{6} = -1 \] 5. **Roots of the second equation**: \[ y = -\frac{2}{3} \quad \text{and} \quad y = -1 \] ### Step 3: Compare the roots - We have the roots: - For \(x\): \(-1\) and \(-\frac{5}{2}\) - For \(y\): \(-1\) and \(-\frac{2}{3}\) ### Step 4: Determine the relationship between \(x\) and \(y\) - The values of \(x\) and \(y\) are: - \(x_1 = -1\) and \(x_2 = -\frac{5}{2}\) - \(y_1 = -\frac{2}{3}\) and \(y_2 = -1\) - Comparing the values: - Since \(-1 = -1\), we have \(x_1 = y_2\). - Since \(-\frac{5}{2} \approx -2.5\) and \(-\frac{2}{3} \approx -0.67\), we have \(x_2 < y_1\). ### Conclusion From the comparison, we can conclude: \[ x \leq y \] Thus, the correct answer is that \(x\) is less than or equal to \(y\).
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