Z 2 x 2 y 2 1 graph July 8, 2019 16 32 64 128 X 2 y 2 z 2 1 график X 2 a 2 y 2 b 2 z 2 c 2 1 graph Z^2 = x^2 + y^2 graph Z = x^2 + y^2 graph
