Răspuns:
a)x=(8/3√2+6/√2)•√2/13(rationalizezi cu √2)
x=(8√2/6+6√2/2)•√2/13(aduci la acelasi numitor)
x=(8√2/6+18√2/6)•√2/13
x=26√2/6•√2/13(simplifici 13 cu 26)
x=2√2•√2/6(simplifici 2 cu 6)
x=√2•√2/3
x=2/3(A)
b)y=(1/√3-5/7√3):√3/14(rationalizezi cu √3)
y=(√3/3-5√3/21)•14/√3(aduci la acelasi numitor)
y=(7√3/21-5√3/21)•14/√3
y=2√3/21•14/√3(simplifici √3 cu √3)
y=28/21(simplifica prin 7)
y=4/3
x+y=2/3+4/3
x+y=6/3(simplificam)
x+y=2
