other govt exam NBE Junior Assistant 2024 Mock Tests Series Quantitative Aptitude Algebra Identities

Find the value of a2 + b2 + c2 - 2ab + 2ac - 2bc, if a = x + y, b = x - y and c = 2x - 1.

1
(x - y - 1)2
2
(2x + 2y - 1)2
3
0
4
(2x - 2y - 1)2
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