Given y + 2x = 1, find the value of (y + 1) 2 - (y2-4x)

Given y + 2x = 1, find the value of (y + 1) 2 - (y2-4x)

(y + 1) 2 - (y2-4x), = Y2 + 2Y + 1-y2 + 4x, = 2Y + 4x + 1, = 2 (y + 2x) + 1