36z^2 + 2 = 36z^2 + 9z + 12z + 3
2 = 21z + 3
21z = -1
z = - 1/21
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-21z-1=0
-21z=1
z=- 1/21
36z^2 + 2 = 36z^2 + 9z + 12z + 3
2 = 21z + 3
21z = -1
z = - 1/21