Answer:
a.
Step-by-step explanation:
well, just put the parameters into the expression and do the calculations :
(((2+h)² + 2(2+h) - 1) - (2² + 2×2 - 1))/h
(((4 + 4h + h²) + 4 + 2h - 1) - 4 - 4 + 1)/h
(h² + 6h)/h = h + 6
