BrinkerSky9487 BrinkerSky9487
  • 23-01-2024
  • Mathematics
contestada

Let a, b, c be any real numbers. Suppose that there are real numbers x, y, z not all zero such that x = cy + bz, y = az + cx and z = bx + ay. Then a2 + b2 + c2 + 2abc is equal to
(a) 1
(b) 2
(c) – 1
(d) 0

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