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Direction: In the following questions tw...

Direction: In the following questions two equations numbered (I) and (II) are given. You have to solve both equations and Give answer
I. `2p^2+p-28=0` II. `2q^2-23q+56=0`

A

If `p gt q`

B

If `p ge q`

C

If `q gt p`

D

if `q ge p`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given equations step by step, we will start with each equation separately. ### Step 1: Solve Equation I The first equation is: \[ 2p^2 + p - 28 = 0 \] To solve this quadratic equation, we can factor it. We need to find two numbers that multiply to \(2 \times -28 = -56\) and add to \(1\) (the coefficient of \(p\)). The factors of \(-56\) that add up to \(1\) are \(8\) and \(-7\). So, we can rewrite the equation as: \[ 2p^2 + 8p - 7p - 28 = 0 \] Now, we can group the terms: \[ (2p^2 + 8p) + (-7p - 28) = 0 \] Factoring out the common terms: \[ 2p(p + 4) - 7(p + 4) = 0 \] Now, we can factor out \((p + 4)\): \[ (2p - 7)(p + 4) = 0 \] Setting each factor to zero gives us: 1. \(2p - 7 = 0 \Rightarrow p = \frac{7}{2}\) 2. \(p + 4 = 0 \Rightarrow p = -4\) ### Step 2: Solve Equation II The second equation is: \[ 2q^2 - 23q + 56 = 0 \] Again, we will factor this quadratic equation. We need two numbers that multiply to \(2 \times 56 = 112\) and add to \(-23\). The factors of \(112\) that add up to \(-23\) are \(-16\) and \(-7\). So, we can rewrite the equation as: \[ 2q^2 - 16q - 7q + 56 = 0 \] Now, we can group the terms: \[ (2q^2 - 16q) + (-7q + 56) = 0 \] Factoring out the common terms: \[ 2q(q - 8) - 7(q - 8) = 0 \] Now, we can factor out \((q - 8)\): \[ (2q - 7)(q - 8) = 0 \] Setting each factor to zero gives us: 1. \(2q - 7 = 0 \Rightarrow q = \frac{7}{2}\) 2. \(q - 8 = 0 \Rightarrow q = 8\) ### Step 3: Compare Values of p and q Now we have the values: - For \(p\): \(\frac{7}{2}\) and \(-4\) - For \(q\): \(\frac{7}{2}\) and \(8\) We will compare the values of \(p\) and \(q\): 1. When \(p = \frac{7}{2}\): - \(q = \frac{7}{2}\) → \(p = q\) - \(q = 8\) → \(p < q\) 2. When \(p = -4\): - \(q = \frac{7}{2}\) → \(p < q\) - \(q = 8\) → \(p < q\) ### Conclusion From the comparisons, we can conclude: - \(p\) is equal to \(q\) in one case. - In both cases, \(p\) is less than \(q\). Thus, we can say: \[ q \geq p \] ### Final Answer The correct option is: \[ q \text{ is greater than or equal to } p \]
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