Answer:
(-1, -1)
f(x) = x² + 2x
f(x) = x² + 2x + 1 - 1
f(x) = (x + 1)² - 1
x-coordinate: x + 1 = 0 thus x = -1
y-coordinate: -1 (after (x + 1)²)
That's all. Hope it helps.
