The equation of a common tangent to the parabolas $y = x ^ { 2 }$ and $y = -(x - 2) ^ { 2 }$ is (1) $y = 4 x - 2$ (2) $y = 4 x - 1$ (3) $y = 4 x + 1$ (4) $y = 4 x + 2$
The equation of a common tangent to the parabolas $y = x ^ { 2 }$ and $y = -(x - 2) ^ { 2 }$ is\\
(1) $y = 4 x - 2$\\
(2) $y = 4 x - 1$\\
(3) $y = 4 x + 1$\\
(4) $y = 4 x + 2$