Ex 12.2, 2 (v) - Chapter 12 Class 8 Factorisation
Last updated at Dec. 16, 2024 by Teachoo
Factorisation using identities
Factorisation using identities
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Transcript
Ex 12.2, 2 Factorise. (v) 〖"(l + m)" 〗^2– 〖"(l – m)" 〗^2〖"(l + m)" 〗^2– 〖"(l – m)" 〗^2 Using 𝒂^𝟐− 𝒃^𝟐 = (a + b) (a − b) Here a = (l + m) and b = (l − m) = [("l" + m) + ("l" − m)] [("l" + m) − ("l "− m)] = ["l" + m + "l" − m] ["l" + m − "l" + m] = (2"l") (2m) = 2 × 2 × "l" × m = 4"l"m
