If a2 + b2 + c2 = 250 and ab + bc + ca = 3, find a + b + c.

Q6 of 111 Page 5

If a² + b² + c² = 250 and ab + bc + ca = 3, find a + b + c.

We have,

Then,

= =

Ifa²+b²+c²=20,anda+b+c=0,findab+bc+ca.

If a + b + c = 9 and ab + bc + ca = 40, find a² + b² + c².

Write the value of: 25³–75³+50³.

Write the value of: 48³–30³-18³.