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Sagot :

Bonjour,

Développer

E= 2(√5 + 3)(√5 + 3)

E= 2(√25+3√5+3√5+9)

E= 2(√25+6√5+9)

E= 2( 5 +6√5 +9)

E= 10 + 12√5 +18

E= 28 + 12√5

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