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bonsoir A = √8 + 7√2 a = √2*4 + 7/2 = 2√2 + 7√2 = 9√2 b = √5 - √20 = √5 - √5*4 = √5 - 2√5 = 3√5
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bonsoir A = √8 + 7√2 a = √2*4 + 7/2 = 2√2 + 7√2 = 9√2 b = √5 - √20 = √5 - √5*4 = √5 - 2√5 = 3√5