Question 43Asked in CTET July 2024 Paper 2 Maths & Science, 7 Jul 2024

If (2x + 5y)² − 5(2x + 5y) − 14 = (2x + 5y + p)(2x + 5y + q), then the value of (p + q) is :यदि (2x+5y)²−5(2x+5y)−14=(2x+5y+p)(2x+5y+q) है, तो (p+q) का मान है :

यदि (2x+5y)²−5(2x+5y)−14=(2x+5y+p)(2x+5y+q) है, तो (p+q) का मान है :
  1. A77
  2. B−14−14
  3. C99
  4. D−5−5
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Correct answer: (D) −5−5

Explanation

Put t = 2x + 5y: t² − 5t − 14 = (t + p)(t + q) = t² + (p + q)t + pq, so p + q = −5 (indeed t² − 5t − 14 = (t − 7)(t + 2)).t = 2x + 5y रखने पर: t² − 5t − 14 = (t + p)(t + q) = t² + (p + q)t + pq, अतः p + q = −5 (वास्तव में t² − 5t − 14 = (t − 7)(t + 2))।

From CTET July 2024 Paper 2 Maths & Science, 7 Jul 2024 — Previous Year Paper

This is question 43 of CTET July 2024 Paper 2 Maths & Science, 7 Jul 2024 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.