NCERT Solutions for Class 9 Maths Chapter 1
Important NCERT Questions
Number Systems
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 1.5
Page No:24
Questions No: 2 Part:4
Simplify each of the following expression: (√5 – √2) (√5 + √2).
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(iv) (√5 – √2)(√5 + √2) = (√5)² – (√2)² = 5 – 2 = 3 [∵ (a – b)(a + b) = a² – b²]