Question

Why is 2x ln(2x) - 2x equal to 2x ln(2x) - 1 ? (e.g. why does that last 2x equal 1?)

Answer 1

alright, we have:

2x (ln(2x)) - 2x

Factor ,and you'll get:

2x(ln(2x)) - 1 ^_^

Answer 2

wait 2x[ ln(2x) - 1] :)

Answer 3

it's like you're factoring

4x^2 - 4x = 4x(x - 1)

^_^ hope you got the picture :)