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

a2 + b2 + c2 - 2ab + 2ac - 2bc का मान ज्ञात कीजिए, यदि a = x + y, b = x - y और c = 2x - 1 है।  

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