If x+ =3, then find the value of x²+.

If a+b+c=9 and a²+b²+c²=35, find the value of a³ +b³ +c³ -3abc.

Evaluate :

(i) 25³ – 75³ + 50³

(ii) 48³ – 30³ - 18³

(iii)

(iv) (0.2)³ – (0.3)³ + (0.1)³

If x+ =3, then find the value of x⁶+.

If a+b=7 and ab=12, find the value of a²+b².