8716711
Description
Note by Oliver Hall, updated more than 1 year ago
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Created by Oliver Hall
about 7 years ago
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Page 1
Completing The SquareYou should complete the square if you cannot factorise.x²+ax+b = (x+1/2a)²+(b-1/2a²)e.g.x²+8x+21 = (x+4)²+5
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