Home
Class 14
MATHS
Two equations (I) and (II) are given in ...

Two equations (I) and (II) are given in each question. On the basis of these equations you have to decide the relation between x and y and give answer
I. ` 7 x^(2) + 16 x - 15 = 0 `
II. ` y^(2) - 6y - 7 = 0 `

A

If ` x gt y `

B

If ` x lt y `

C

If ` x ge Y`

D

If x = y or no relation can be established between 'x' and 'y'

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given problem, we need to find the values of \( x \) and \( y \) from the provided equations and then determine the relationship between them. ### Step 1: Solve Equation I The first equation is: \[ 7x^2 + 16x - 15 = 0 \] To solve this quadratic equation, we will use the factorization method. We need to find two numbers that multiply to \( 7 \times (-15) = -105 \) and add to \( 16 \). The numbers that satisfy these conditions are \( 21 \) and \( -5 \) because: \[ 21 \times (-5) = -105 \] \[ 21 + (-5) = 16 \] Now we can rewrite the middle term: \[ 7x^2 + 21x - 5x - 15 = 0 \] Next, we group the terms: \[ (7x^2 + 21x) + (-5x - 15) = 0 \] Factoring each group gives: \[ 7x(x + 3) - 5(x + 3) = 0 \] Now we can factor out \( (x + 3) \): \[ (7x - 5)(x + 3) = 0 \] Setting each factor to zero gives us: 1. \( 7x - 5 = 0 \) → \( x = \frac{5}{7} \) 2. \( x + 3 = 0 \) → \( x = -3 \) So, the solutions for \( x \) are: \[ x = -3 \quad \text{and} \quad x = \frac{5}{7} \] ### Step 2: Solve Equation II The second equation is: \[ y^2 - 6y - 7 = 0 \] Again, we will use the factorization method. We need two numbers that multiply to \( -7 \) and add to \( -6 \). The numbers that satisfy these conditions are \( -7 \) and \( 1 \) because: \[ -7 \times 1 = -7 \] \[ -7 + 1 = -6 \] Now we can rewrite the equation: \[ (y - 7)(y + 1) = 0 \] Setting each factor to zero gives us: 1. \( y - 7 = 0 \) → \( y = 7 \) 2. \( y + 1 = 0 \) → \( y = -1 \) So, the solutions for \( y \) are: \[ y = 7 \quad \text{and} \quad y = -1 \] ### Step 3: Determine the Relationship between \( x \) and \( y \) Now we have the values: - For \( x \): \( -3 \) and \( \frac{5}{7} \) - For \( y \): \( 7 \) and \( -1 \) Now we can compare: 1. For \( x = -3 \): - \( -3 < 7 \) (true) - \( -3 > -1 \) (false) 2. For \( x = \frac{5}{7} \): - \( \frac{5}{7} < 7 \) (true) - \( \frac{5}{7} > -1 \) (true) ### Conclusion From the comparisons: - \( x = -3 \) is less than \( y = 7 \) but greater than \( y = -1 \). - \( x = \frac{5}{7} \) is less than \( y = 7 \) and greater than \( y = -1 \). Thus, we can conclude that: - \( x < y \) when \( y = 7 \) - \( x > y \) when \( y = -1 \) Since we have two different scenarios, we cannot establish a definitive relationship between \( x \) and \( y \). ### Final Answer The answer is: **No relation can be established between \( x \) and \( y \)**.
Promotional Banner

Topper's Solved these Questions

  • INEQUALITY

    ADDA247|Exercise Basic Questions |15 Videos
  • INEQUALITY

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

    ADDA247|Exercise PREVIOUS YEAR QUESTIONS |25 Videos
  • MENSURATION

    ADDA247|Exercise PREVIOUS YEAR QUESTION |31 Videos

Similar Questions

Explore conceptually related problems

I. 15x^(2) - 29x - 14 = 0 II. 6y^(2) - 5y - 25 = 0

(i) 7x^(2) + 16x - 15 = 0 (ii) 5y^(2)+ 8y - 21 = 0

I. 5x^(2) + 28x + 15 = 0 II. 6y^(2) + 35y + 25 = 0

I. 5x^(2) + 2x - 3 = 0" "II. 2y^(2) + 7y + 6 = 0

I. x^(2) - 3x + 2 = 0" "II. 2y^(2) - 7y+6 = 0

I. 3x^(2) - 7x+2 = 0" " II. 2y^(2) - 11y + 15 = 0

(i) 15x^(2) - 8x + 1 = 0 (ii) 6y^(2) - 19y + 10 = 0

In the following question two equations are given in variables x and y. you have to solve these equations and determine the relation between x and y. I. x^(2) - 15x + 56 = 0 II. y^(2) - 17y + 72 = 0

ADDA247-INEQUALITY-Previous Year Questions
  1. Two equations (I) and (II) are given in each question. On the basis of...

    Text Solution

    |

  2. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  3. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  4. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  5. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  6. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  7. In each question two equations numbered (I) and (II) are given. You sh...

    Text Solution

    |

  8. In each question two equations numbered (I) and (II) are given . You ...

    Text Solution

    |

  9. In each question two equations numbered (I) and (II) are given . You ...

    Text Solution

    |

  10. In each question two equations numbered (I) and (II) are given . You ...

    Text Solution

    |

  11. In each question two equations numbered (I) and (II) are given . You ...

    Text Solution

    |

  12. In each question two equations numbered (I) and (II) are given . You ...

    Text Solution

    |

  13. In the following two equations questions numbered (I) and (II) are giv...

    Text Solution

    |

  14. In the following two equations questions numbered (I) and (II) are giv...

    Text Solution

    |

  15. In the following two equations questions numbered (I) and (II) are giv...

    Text Solution

    |

  16. In the following two equations questions numbered (I) and (II) are giv...

    Text Solution

    |

  17. In the following two equations questions numbered (I) and (II) are giv...

    Text Solution

    |

  18. In the following questions, there are two equations in x and y . You h...

    Text Solution

    |

  19. In the following questions, there are two equations in x and y . You h...

    Text Solution

    |

  20. In the following questions, there are two equations in x and y . You h...

    Text Solution

    |

  21. In the following questions, there are two equations in x and y . You h...

    Text Solution

    |