state gov AP Police SI (Pre+Mains) Mock Test 2022 Quantitative Aptitude Algebra Identities

यदि a = y + z - 2x, b = 2y - x - z और c = x + y - 2z तो (a2 - b2 + c2 + 2ac) का मान ज्ञात कीजिये?

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