The original function is y=x^2. The function shifted two to the left is y=(x+2)^2. It is the same shape but with every point shifted two to the left, so the vertex is now at -2 on the x-axis. The function shifted two to the right is y=(x-2)^2. It is the same shape as the original but with every point shifted two to the right, so the vertex is now at 2 on the x-axis.
{}