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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 appropiate option.
I `10x^2+21x+8=0`
II `5y^2+19y+18=0`

A

`xley`

B

`xgey`

C

`xlty`

D

`xgty`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the equations given in the question step by step, we will tackle each equation separately. ### Step 1: Solve Equation I The first equation is: \[ 10x^2 + 21x + 8 = 0 \] To factor this quadratic equation, we need to express the middle term (21x) as a sum of two terms whose coefficients multiply to \(10 \times 8 = 80\) and add up to \(21\). We can split \(21x\) into \(16x + 5x\): \[ 10x^2 + 16x + 5x + 8 = 0 \] Now we can group the terms: \[ (10x^2 + 16x) + (5x + 8) = 0 \] Factoring out the common terms: \[ 2x(5x + 8) + 1(5x + 8) = 0 \] Now we can factor by grouping: \[ (2x + 1)(5x + 8) = 0 \] Setting each factor to zero gives us: 1. \(2x + 1 = 0 \Rightarrow x = -\frac{1}{2}\) 2. \(5x + 8 = 0 \Rightarrow x = -\frac{8}{5}\) Thus, the solutions for \(x\) are: \[ x = -\frac{1}{2}, -\frac{8}{5} \] ### Step 2: Solve Equation II The second equation is: \[ 5y^2 + 19y + 18 = 0 \] Similarly, we need to express \(19y\) as a sum of two terms whose coefficients multiply to \(5 \times 18 = 90\) and add up to \(19\). We can split \(19y\) into \(10y + 9y\): \[ 5y^2 + 10y + 9y + 18 = 0 \] Now we can group the terms: \[ (5y^2 + 10y) + (9y + 18) = 0 \] Factoring out the common terms: \[ 5y(y + 2) + 9(y + 2) = 0 \] Now we can factor by grouping: \[ (5y + 9)(y + 2) = 0 \] Setting each factor to zero gives us: 1. \(5y + 9 = 0 \Rightarrow y = -\frac{9}{5}\) 2. \(y + 2 = 0 \Rightarrow y = -2\) Thus, the solutions for \(y\) are: \[ y = -2, -\frac{9}{5} \] ### Step 3: Compare the Solutions Now we have the solutions: - For \(x\): \(x = -\frac{1}{2}, -\frac{8}{5}\) - For \(y\): \(y = -2, -\frac{9}{5}\) Next, we will compare the values of \(x\) and \(y\): - The largest value of \(x\) is \(-\frac{1}{2}\) and the largest value of \(y\) is \(-2\). Since \(-\frac{1}{2} > -2\), we conclude that: \[ x > y \] ### Final Answer The appropriate option is: \[ x > y \]
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