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Ex 9.4, 2 (ii) - Chapter 9 Class 8 Algebraic Expressions and Identities
Last updated at March 23, 2023 by Teachoo
Ex 9.4
Ex 9.4, 1 (i)
Ex 9.4, 1 (ii)
Ex 9.4, 1 (iii) Important
Ex 9.4, 1 (iv)
Ex 9.4, 1 (v) Important
Ex 9.4, 1 (vi) Important
Ex 9.4, 2 (i)
Ex 9.4, 2 (ii) Important You are here
Ex 9.4, 2 (iii)
Ex 9.4, 2 (iv) Important
Ex 9.4, 3 (i)
Ex 9.4, 3 (ii)
Ex 9.4, 3 (iii) Important
Ex 9.4, 3 (iv)
Ex 9.4, 3 (v) Important
Ex 9.4, 3 (vi)
Ex 9.4, 3 (vii) Important
Ex 9.4, 3 (viii)
Transcript
Ex 9.4, 2 Find the product. (ii) (𝑥+7𝑦) (7𝑥−𝑦) (𝑥+7𝑦) (7𝑥−𝑦) = 𝑥(7𝑥−𝑦)+7𝑦(7𝑥−𝑦) = (𝑥×7𝑥)−(𝑥×𝑦)+(7𝑦×7𝑥)−(7𝑦×𝑦) = 7𝑥^2−𝑥𝑦+49𝑦𝑥−7𝑦^2 = 𝟕𝒙^𝟐+𝟒𝟖𝒙𝒚−𝟕𝒚^𝟐
