One of the factors of is :

This question was previously asked in
CBSE Superintendent Official Paper (Held On: 20 Apr, 2025)
View all CBSE Superintendent Papers >
  1. \(2x+4y+5\)
  2. \(2x-4y-5\)
  3. \(3x+6y-1\)
  4. \(3x-6y+1\)

Answer (Detailed Solution Below)

Option 4 : \(3x-6y+1\)
Free
ST 1: Current Affairs and General Awareness
6.4 K Users
20 Questions 60 Marks 20 Mins

Detailed Solution

Download Solution PDF

Given:

The expression to factorize is 6x2 - 24xy + 17x + 24y2 - 34y + 5

Calculation:

Let's try to group terms or use a systematic approach.

Consider the quadratic terms: 6x2 - 24xy + 24y2

We can factor out 6: 6(x2 - 4xy + 4y2)

Recognize the perfect square trinomial: 6(x - 2y)2

So the expression becomes: 6(x - 2y)2 + 17x - 34y + 5

Notice that 17x - 34y can be factored as 17(x - 2y).

Let P = (x - 2y).

The expression now becomes: 6P2 + 17P + 5

This is a quadratic expression in P. We can factor this quadratic.

We need two numbers that multiply to 6 × 5 = 30 and add up to 17. These numbers are 15 and 2.

6P2 + 15P + 2P + 5

(6P2 + 15P) + (2P + 5)

3P(2P + 5) + 1(2P + 5)

(3P + 1)(2P + 5)

Now substitute P = (x - 2y) back into the factored expression:

[3(x - 2y) + 1][2(x - 2y) + 5]

[3x - 6y + 1][2x - 4y + 5]

So, the factors are (3x - 6y + 1) and (2x - 4y + 5).

∴ The correct answer is option 4.

Latest CBSE Superintendent Updates

Last updated on Jun 10, 2025

 

-> The CBSE Superintendent 2025 Skill Test Notice has been released which will be conducted on 5th July 2025.

-> The Tier-I Exam was conducted on 20th April 2025.

-> Eligible candidates had submitted their applications online between January 2nd and 31st, 2025.

-> The selection process includes written examination and document verification.

-> This position entails managing administrative and operational duties within the board, requiring excellent organizational skills to ensure the seamless execution of academic and administrative functions.

Get Free Access Now
Hot Links: teen patti rummy teen patti online mpl teen patti teen patti plus teen patti game - 3patti poker