Question

In the equation
=(x+h)^2
How does that distribute out to
=x^2+2xh+h^2
I guess my main question is where does the 2xh come from??
Thank You

Answer 1

(x+h)(x+h)
= x*x + h*x + x*h + h*h
= x^2 + 2hx + h^2

Answer 2

x is the varible it is also what is known as the x axis can be used as explained @above