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Last updated at Dec. 24, 2018 by Teachoo
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Ex 9.5, 7 Using ๐^2โ๐^2=(๐+๐)(๐โ๐) , find (i) ใ51ใ^2โใ49ใ^2 ใ51ใ^2โใ49ใ^2 ๐^2โ๐^2=(๐+๐)(๐โ๐) Putting ๐ = 51 & ๐ = 49 = (51+49)ร(51โ49) = 100ร2 = ๐๐๐ Ex 9.5, 7 Using ๐^2โ๐^2=(๐+๐)(๐โ๐) , find (ii) (1.02)^2โ(0.98)^2 (1.02)^2โ(0.98)^2 ๐^2โ๐^2=(๐+๐)(๐โ๐) Putting ๐ = 1.02 & ๐ = 0.98 = (1.02+0.98)ร(1.02โ0.98) = 2ร0.04 = 2ร4/100 = 8/100 = ๐.๐๐ Ex 9.5, 7 Using ๐^2โ๐^2=(๐+๐)(๐โ๐) , find (iii) ใ153ใ^2โใ147ใ^2 ใ153ใ^2โใ147ใ^2 ๐^2โ๐^2=(๐+๐)(๐โ๐) Putting ๐ = 153 & ๐ = 147 ๐^2โ๐^2=(๐+๐)(๐โ๐) Putting ๐ = 153 & ๐ = 147 Ex 9.5, 7 Using ๐^2โ๐^2=(๐+๐)(๐โ๐) , find (iv) ใ12.1ใ^2โใ7.9ใ^2 ใ12.1ใ^2โใ7.9ใ^2 ๐^2โ๐^2=(๐+๐)(๐โ๐) Putting ๐ = 12.1 & ๐ = 7.9 = (12.1+7.9)ร(12.1โ7.9) = 20ร4.2 = 20ร42/10 = 2ร42 = ๐๐
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