Question

Упростите выражения:

Answer 1

1)1+2√5+5=6+2√5
2)5-3=2
3)√7(3√2+1):√7-2√2=3√2+1-2√2=√2+1

Answer 2

$(1+ sqrt{5})^2=1+2 sqrt{5} + (sqrt{5})^2=6+2 sqrt{5}$

$( sqrt{5}-sqrt{3})(sqrt{5}+sqrt{3})=( sqrt{5})^2- (sqrt{3} )^2=5-3=2$