Réponse :
Bonsoir,
[tex]A=\sqrt{8}(3\sqrt{2} -5)+(1+\sqrt{2} )(1-\sqrt{2})\\A=3*\sqrt{8}*\sqrt{2} -5*\sqrt{8} +(1^{2}-\sqrt{2} ^{2} )\\A=3*\sqrt{8*2} -5\sqrt{8} +(1-2)\\A=3*\sqrt{16}-5\sqrt{2*2*2} -1\\A=3*4-5*2\sqrt{2} -1\\A=11-10\sqrt{2}[/tex]
[tex]B=(\sqrt{50}-1)^{2} -(\sqrt{2}-5)(4-\sqrt{2} )\\B=50-2*1*\sqrt{50}+1-(4\sqrt{2} -\sqrt{2}*\sqrt{2} -20+5\sqrt{2})\\B=51-2\sqrt{50} -(9\sqrt{2} -2-20)\\B=51-2\sqrt{2*5*5} -(9\sqrt{2}-22)\\B=51-2\sqrt{2}*\sqrt{25} -9\sqrt{2}+22\\B=73-2\sqrt{2}*5-9\sqrt{2}\\B=73-10\sqrt{2}-9\sqrt{2}\\B=73-19\sqrt{2}[/tex]
Bonne soiréeee :)
