1.

Expansion of (a-b-c)² = ?

Answer»

(a - b - C )^2

= ( a - b - c ) ( a - b - c )

= a ( a - b - c ) - b ( a - b - c ) - c ( a - b - c )

= a ^2 - AB - AC - ab + b ^2 + bc - ac + bc + c 2

= a ^2 + b ^2 + c ^2 - 2ab + 2bc - 2ac

Thetefore,

( a - b - c )^2 = a^2 + b ^2 + c ^2 - 2ab + 2bc - 2ac

I hope this will useful to you.

*****


Discussion

No Comment Found

Related InterviewSolutions