Question

If x =a-b, y=b-c and z=c-a then find the value of (a+b) x+(b+c) y+(c+a) z.


please solve this problem........
it's urgent........
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Answer 1

Answer:

Given x=b-c ,y=c-a and z=a-b

Then x

2

−y

2

+z

2

+2xz

=(b−c)

2

−(c−a)

2

+(a−b)

2

+2(b−c)(a−b)=b

2

−2bc+c

2

−c

2

−a

2

+2ac+a

2

+b

2

−2ab+2ab−2ac−b

2

+2bc=0