Home
Class 14
MATHS
In each of these questions, two equation...

In each of these questions, two equations (I) and (II) are given . You have to solve both the equations and give answer
I. ` 2 x ^(2) + 3 x + 1 = 0 `
II. ` 12 y ^(2) + 7y + 1 = 0 `

A

If ` x gt y `

B

If ` x lt y `

C

If ` x ge Y`

D

If ` x le y `

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given equations step by step, let's start with each equation one by one. ### Step 1: Solve Equation I The first equation is: \[ 2x^2 + 3x + 1 = 0 \] To solve this quadratic equation, we can use the factorization method. We need to find two numbers that multiply to \(2 \times 1 = 2\) and add to \(3\). We can rewrite the middle term: \[ 2x^2 + 2x + x + 1 = 0 \] Now, we can group the terms: \[ (2x^2 + 2x) + (x + 1) = 0 \] Factoring out the common terms: \[ 2x(x + 1) + 1(x + 1) = 0 \] Now, we can factor by grouping: \[ (2x + 1)(x + 1) = 0 \] Setting each factor to zero gives us: 1. \(2x + 1 = 0\) → \(2x = -1\) → \(x = -\frac{1}{2}\) 2. \(x + 1 = 0\) → \(x = -1\) Thus, the solutions for \(x\) are: \[ x_1 = -\frac{1}{2}, \quad x_2 = -1 \] ### Step 2: Solve Equation II The second equation is: \[ 12y^2 + 7y + 1 = 0 \] Again, we will use the factorization method. We need to find two numbers that multiply to \(12 \times 1 = 12\) and add to \(7\). We can rewrite the middle term: \[ 12y^2 + 4y + 3y + 1 = 0 \] Now, we can group the terms: \[ (12y^2 + 4y) + (3y + 1) = 0 \] Factoring out the common terms: \[ 4y(3y + 1) + 1(3y + 1) = 0 \] Now, we can factor by grouping: \[ (4y + 1)(3y + 1) = 0 \] Setting each factor to zero gives us: 1. \(4y + 1 = 0\) → \(4y = -1\) → \(y = -\frac{1}{4}\) 2. \(3y + 1 = 0\) → \(3y = -1\) → \(y = -\frac{1}{3}\) Thus, the solutions for \(y\) are: \[ y_1 = -\frac{1}{4}, \quad y_2 = -\frac{1}{3} \] ### Step 3: Compare the Values of x and y Now we have the solutions: - For \(x\): \(x_1 = -\frac{1}{2}, \quad x_2 = -1\) - For \(y\): \(y_1 = -\frac{1}{4}, \quad y_2 = -\frac{1}{3}\) Now we will compare the values of \(x\) and \(y\): 1. Comparing \(x_1 = -\frac{1}{2}\) with \(y_1 = -\frac{1}{4}\): \(-\frac{1}{2} < -\frac{1}{4}\) (So, \(x_1 < y_1\)) 2. Comparing \(x_1 = -\frac{1}{2}\) with \(y_2 = -\frac{1}{3}\): \(-\frac{1}{2} < -\frac{1}{3}\) (So, \(x_1 < y_2\)) 3. Comparing \(x_2 = -1\) with \(y_1 = -\frac{1}{4}\): \(-1 < -\frac{1}{4}\) (So, \(x_2 < y_1\)) 4. Comparing \(x_2 = -1\) with \(y_2 = -\frac{1}{3}\): \(-1 < -\frac{1}{3}\) (So, \(x_2 < y_2\)) ### Conclusion In all comparisons, we find that \(x\) is less than \(y\). Therefore, the relation between \(x\) and \(y\) is: \[ x < y \]
Promotional Banner

Topper's Solved these Questions

  • INEQUALITY

    ADDA247|Exercise Prelims Questions (Level - 1) |50 Videos
  • INEQUALITY

    ADDA247|Exercise Prelims Questions (Level - 2) |55 Videos
  • INEQUALITY

    ADDA247|Exercise Previous Year Questions |75 Videos
  • DATA SUFFICIENCY

    ADDA247|Exercise PREVIOUS YEAR QUESTIONS |25 Videos
  • MENSURATION

    ADDA247|Exercise PREVIOUS YEAR QUESTION |31 Videos

Similar Questions

Explore conceptually related problems

In the following question, two equations numbered I and II are given. You have to solve both the equations and give answer: y^2 = 49 (x – y)^2 = 0

In the following questions two equations numbered I and II are given. You have to solve both the equations and Give answer I. x^(2)-7x+12=0 II. y^(2)-12y+32=0

In the following question, two equations numbered I and II are given. You have to solve both the equations and give the answer: 4x^2 – 3x - 1 = 0 2y^2 - 7y - 9 = 0

In the following question, two equations numbered I and II are given. You have to solve both the equations and give the answer: I. x^2-x-12=0 II. y^2+5y+6=0

In the following questions two equations numbered I and II are given. You have to solve both the equations and Give answer I x^(2)-1=0 II. y^(2) +4y+3=0

In the following questions two equations numbered I and II are given. You have to solve both the equations and Give answer I. x^(3)-371 =629 II. y^(3)-543= 788

In the following question, two equations numbered I and II are given. You have to solve both the equations and give the answer: x^2 – 28 + 3x = 0 8y^2 - y - 9 = 0

In the following questions two equation numbered I and II are given You have to solve both equations and give answer (ii) 5x-2y=31 (ii) 3x+7y=36

In the following questions two equation numbered I and II are given You have to solve both equations and give answer (i) x^(2)=729 (ii) y=sqrt(729)