NCERT Class 9 Solutions: Polynomials (Chapter 2) Exercise 2.5 – Part 1

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Q-1 Use suitable identities to find the following products:

Solution:

Most common algebraic identities

Common Algebraic Identities

Most common algebraic identities

  1. Using identify

  2. Using identify

  3. Using identify

  4. Using identify

  5. Using identify

Q-2 Evaluate the following products without multiplying directly:

Solution:

Q-3 Factories the following using appropriate identities:

Understanding the geometric proof of (a + b) squared

Proof of (A + B) Squared

Understanding the geometric proof of (a + b) squared

Understanding the geometric proof of (a - b) squared

Proof of (A Minus B) Squared

Understanding the geometric proof of (a - b) squared

Understanding the geometric proof of a squared - b squared

Geometric Proof of a Squared - B Squared

Understanding the geometric proof of a squared - b squared

Solution:

  1. (Applying )

  2. (Applying )

  3. (Applying )