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Gurdeep Sing
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Asked: 2020-11-07T09:21:19+00:00 In:

Expand each of the following, using suitable identities: (x + 2y + 4z)²

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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:49
Questions No:4 part:1

2020-2021cbsechapter 2class 9mathematicsncertpolynomials
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    2 Answers

    1. Get Hindi Medium and English Medium NCERT Solution for Class 9 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-9/maths/chapter-2/

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    2. Best Answer

      (i) (x + 2y + 4z)²
      = x² + (2y)² + (4z)² + 2 × (x) × (2y) + 2 × (2y) × (4z) × (x) [∵ (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca]
      = x² + 4y² + 16x² + 4xy + 16yz + 4zx

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