NCERT Solutions for Class 9 Maths Chapter 2
Important NCERT Questions
Polynomials
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 2.5
Page No:48
Questions No:1 part:5
Use suitable identities to find the following products: (3 – 2x) (3 + 2x)
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(v) (3 – 2x)(3 + 2x)
= (3)² – (2x)² [∵ (a + b)(a – b) = a² – b²]
= 9 – 4x²