Question

(√2-1)²


Urgent
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Answer 1

(√2-1)²=(√2)²-2√2+1²=
         =2-2√2+1=
         =3-2√2

Answer 2

$( \sqrt{2}-1) ^{2} =2-2 \sqrt{2} +1 =3- 2\sqrt{2}$