Question

simplifique as espressoes

a:  2rais de5(3+rais de5 )=

b:3rais de 2(2rais de 3-rais de2)=

c:(2-rais de3)(1+rais de2)=

d:(rais de3+1)(rais de3-1)=

e:(2rais de2-3)(2rais de2+3)

f:(2+rais de3)²

g:(rais de3-1)²=

Answer 1

$a)\;~~2\sqrt{5}(3+\sqrt{5})=6\sqrt{5}+10\\\\ b)\;~~3\sqrt{2}(2\sqrt{3}-\sqrt{2})=6\sqrt{6}-6\\\\ c)\;~~(2-\sqrt{3})(1+\sqrt{2})=2+2\sqrt{2}-\sqrt{3}-\sqrt{6}\\\\ d)\;~~(\sqrt{3}+1)(\sqrt{3}-1)=3-1=2\\\\ e)\;~~(2\sqrt{2}-3)(2\sqrt{2}+3)=8-9=-1\\\\ f)\;~~(2+\sqrt{3})^{2}=4+4\sqrt{3}+3=7+4\sqrt{3}\\\\ g)\;~~(\sqrt{3}-1)^{2}=3-2\sqrt{3}+1=4-2\sqrt{3}$