Find the limit multiple choice

Question

Find the limit: lim_h->0[(x+h)²+2(x+h)-1-(x²+2x-1)]/h

a.2x+1

b.x+2

c.2x+2

d.x²+2x-1

Answer 1

x^2 + 2xh + h^2 + 2x + 2h - 1 - x^2 - 2x - 1 = 2xh + h^2 + 2h

divide that by h to get 2x + h + 2

let h go to zero and the limit is 2x + 2, answer c