Question

calculati:
a)2(4-$\sqrt{7}$)
b)6(5-$\sqrt{5} }$)

Answer 1

[tex]a)2(4-\sqrt7)=8-2\sqrt7=7+1-2\sqrt7=(\sqrt7-1)^2\\ b)6(5-\sqrt5)=30-6\sqrt5\\ Nu\ stiu\ cum\ se\ descompune\ asta...[/tex]