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(2√2+1) totul la puterea 2


Răspuns :

(2√2+1)²=
=8+4√2+1=
=9+4√2
(2√2+1)^2=
=(2√2)^2+2×2√2+1^2=
=8+4√2+1=
=8+1+4√2=
=9+4√2