a
Calculaţi: x - y - z, x+y-z şi-x - y + z, unde x = -a + b -c, y = a-b-c şi
z=-a-b+c, iar:
a) a=5√5-3√2+2√3, b = √5-4√√2-3√3,c=2√5-√3-5√2;
b) a=6√5-5√2-4√3,
c) a= 4√5-7√2-3√3, b=-2√5
b=3√√5-4√2-6√3,c= -√5 +2√3-6√2;
+5√2-7√3,c=-3√5-3√2-5√3.