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2013 preRMO p11 x^2+6y=-17, y^2+4z=1, z^2+2x=2, x^2 + y^2 + z^2 ?

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August 8, 2019
algebrasystem of equations

Problem Statement

Three real numbers x,y,zx, y, z are such that x2+6y=āˆ’17,y2+4z=1x^2 + 6y = -17, y^2 + 4z = 1 and z2+2x=2z^2 + 2x = 2. What is the value of x2+y2+z2x^2 + y^2 + z^2?