y=1/2(x+1)(x-3)

Question

Can you write this in vertex form

Answer 1

Yes, I can.

y = 0.5(x² - 2x - 3)

2y = x² - 2x + 1 - 3 - 1 Completion of Square

2y = (x - 1)² - 4

y = 0.5(x - 1)² - 2