Class 8 · Chapter 6

We Distribute, Yet Things Multiply

Algebraic identities, expansion, and factorisation.

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Ganita Prakash · Class 8 Part 1 (2026-27)

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Detailed theory

Memorise the three main identities. They save time in algebra and problem-solving.

Key concepts & formulas

(a+b)^2 = a^2 + 2ab + b^2

(a-b)^2 = a^2 - 2ab + b^2

a^2 - b^2 = (a+b)(a-b)

(x+a)(x+b) = x^2 + (a+b)x + ab

Common factor method: pull the common factor out.