Question

Геометрия.8 класс,номер 2

Answer 1

c^2=а^2+b^2
c^2=(3√5-2)^2+(3√5+2)^2
c^2=9*5-2*3√5*2+4+9*5+2*3√5*2+4
c^2=45-12√5+4+45+12√5+4
c^2=98
c=√98