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Last updated at Dec. 26, 2018 by Teachoo
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Example 7 Factorise ๐^2 โ 2ab + ๐^2 โ ๐^2 ๐^2 โ 2ab + ๐^2 โ ๐^2 = ๐^๐+๐^๐โ๐๐๐โ๐^2 Using (๐โ๐)^2 = ๐^2+๐^2โ2๐๐ = (๐โ๐)^2 โ๐^2 Using ๐ฅ^2โ๐ฆ^2=(๐ฅ+๐ฆ)(๐ฅโ๐ฆ) Here ๐ฅ=(๐โ๐), y = c = ((๐โ๐)+๐) ((๐โ๐)โ๐) = (๐โ๐+๐) (๐โ๐โ๐)
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