Question

if a+b+c=6cm find the value of (2-a)³+(2-b)³+(2-c)³-3(2-a)(2-c)

Answer 1

(2-a) + (2-b) + (2-c) + -3 (2-a) (2-c)

(2-6) + (2- 6)+ (2- 6) + -3 (2-6) (2-6)

( 52 ) + (52) + ( 52) + -3 (52) (52 )

156 - 2684

2,528