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Directions:In each of these questions tw...

Directions:In each of these questions two equations numbered I and II are given. You have to solve both the equations and give answer.
I. `2x^2+5x+2=0` II. `4y^2-7y-2=0`

A

if `x lt y`

B

if `x le y`

C

if `x gt y`

D

if `x ge y`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given equations step by step, we will first address each equation separately. ### Step 1: Solve Equation I: \(2x^2 + 5x + 2 = 0\) 1. **Identify the coefficients**: - \(a = 2\), \(b = 5\), \(c = 2\) 2. **Use the quadratic formula**: The quadratic formula is given by: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] 3. **Calculate the discriminant**: \[ b^2 - 4ac = 5^2 - 4 \cdot 2 \cdot 2 = 25 - 16 = 9 \] 4. **Substitute values into the quadratic formula**: \[ x = \frac{-5 \pm \sqrt{9}}{2 \cdot 2} = \frac{-5 \pm 3}{4} \] 5. **Calculate the two possible values for \(x\)**: - First value: \[ x_1 = \frac{-5 + 3}{4} = \frac{-2}{4} = -\frac{1}{2} \] - Second value: \[ x_2 = \frac{-5 - 3}{4} = \frac{-8}{4} = -2 \] ### Step 2: Solve Equation II: \(4y^2 - 7y - 2 = 0\) 1. **Identify the coefficients**: - \(a = 4\), \(b = -7\), \(c = -2\) 2. **Use the quadratic formula**: \[ y = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] 3. **Calculate the discriminant**: \[ b^2 - 4ac = (-7)^2 - 4 \cdot 4 \cdot (-2) = 49 + 32 = 81 \] 4. **Substitute values into the quadratic formula**: \[ y = \frac{7 \pm \sqrt{81}}{2 \cdot 4} = \frac{7 \pm 9}{8} \] 5. **Calculate the two possible values for \(y\)**: - First value: \[ y_1 = \frac{7 + 9}{8} = \frac{16}{8} = 2 \] - Second value: \[ y_2 = \frac{7 - 9}{8} = \frac{-2}{8} = -\frac{1}{4} \] ### Step 3: Compare the values of \(x\) and \(y\) - Possible values for \(x\) are \(-\frac{1}{2}\) and \(-2\). - Possible values for \(y\) are \(2\) and \(-\frac{1}{4}\). Now we compare: 1. For \(x = -\frac{1}{2}\) and \(y = -\frac{1}{4}\): \[ -\frac{1}{2} < -\frac{1}{4} \quad \text{(True)} \] 2. For \(x = -2\) and \(y = -\frac{1}{4}\): \[ -2 < -\frac{1}{4} \quad \text{(True)} \] 3. For \(x = -\frac{1}{2}\) and \(y = 2\): \[ -\frac{1}{2} < 2 \quad \text{(True)} \] 4. For \(x = -2\) and \(y = 2\): \[ -2 < 2 \quad \text{(True)} \] ### Conclusion From the comparisons, we can conclude that in all cases, \(x < y\). ### Final Answer The relation is \(x < y\).
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