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Sagot :

2√50=√2²*50=√200=√2*100=√2*10²=10√2
√8=√4*2=√2²*2=2√2
√18=√9*2=√3²*2=3√2

√18-2√50+√8 devient 3√2-10√2+2√2 = √2 * (3-10+2) = 5√2

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