Question

Ofer cca.20 puncte,Multumesc!Scrie sub froma unui patrat:
a)3+2√2
b)3-2√2
c)27+10√2
d)9-2√14
e)21+8√5
f)15+2√14

Answer 1

[tex]a) (\sqrt{2}+1)^2=2+ 2\sqrt{2} +1=3+2\sqrt{2}\\ b) (\sqrt{2}-1)^2=2- 2\sqrt{2} +1=3-2\sqrt{2}\\ c) ( \sqrt{2}+5 )^2=2+10\sqrt{2}+25=27+10\sqrt{2}\\ d) ( \sqrt{7}- \sqrt{2})^2=7-2 \sqrt{14}+2=9- 2 \sqrt{14}\\ e) ( \sqrt{14}+1 )^2=14+2 \sqrt{14}+1=15+2 \sqrt{14}[/tex]