if x b c 2a y c a 2b z a b 2c then the value of x2 y2 z2 2xy is | Examsbook

948

Q:
If x = b+c -2a, y=c+a-2b, z=a+b-2c, then the value of x²+y²-z²+2xy is :

1
a-b+c
2
a+b-c
3
0
4
a+b+c

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Answer : 3. "0"

Maths Algebra Question with answer

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