can someone break this down please

Question

Given the function f(x)=x^2 + 2x evaluate and simplify the difference quotient below. See special instructions on how to enter your answer

f(x+h)-f(x)/h

the division sign over the h covers everything not just the f(x)

Answer 1

[(x + h)² + 2(x + h) - (x² + 2x)] \ h

[x² + 2hx + h² + 2x + 2h - x² - 2x] \ h

[2hx + 2h + h²] \ h