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Ex 13 b si d
Dau coroana


Ex 13 B Si D Dau Coroana class=

Răspuns :

b) = [tex] 4*7 + 2*2 \sqrt{7}*1 + 1 = 29 + 4 \sqrt{7}

d) = 9*2 + 2*3 \sqrt{2}* 2 \sqrt{5} + 4*5 = 18 +12 \sqrt{10} + 20 = 38 + 12\sqrt{10} [/tex]
(2√7+1)²=28+4√7+1=29+4√7

(3√2+2√5)²=18+12√10+20=38+12√10