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(√5-2)²+(√7-3)(√7)=?


Răspuns :

√5-2)²+(√7-3)(√7)=
=
5-4√5+4+7-3√7=
= 16-4√5-3√7
(√5)la 2 - 2×√5×2 + 2 la 2 + 7 - 3√7=5-4√5+4+7-3√7= 16-4√5-3√7