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

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Q-4 Expand each of the following using suitable identities:

Solution:

Mathmatical identities for squares of trinomials

Trinomial Square Formulas

Mathmatical identities for squares of trinomials

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  2. Using identify

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  3. Using identify

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  4. Using identify

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  5. Using identify

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  6. Using identify

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Q-5 Factorize:

Solution:

  1. Using identify

  2. Using identify

Q-6 Write the following cubes in expanded form:

Solution:

Important identities with cubes

Most Important Identities Involving Cubes

Important identities with cubes

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  2. Using identify

  3. Using identify

  4. Using identify

Q-7 Evaluate the following using suitable identities:

Geometric interpretation of a + b cubed

Illustrating a + B Cubed

Geometric interpretation of a + b cubed

Solution:

  1. Using identity

  2. Using identity

  3. Using identity

Q-8 Factorize each of the following:

Solution: