Thread: algebraic steps

Hello, I cannot recall my algebra.
how does this go from
n(n+1)/2 +(n+1)

to
n(n+1) + 2(n+1)/2

I'm missing a step in between. Can anyone show me? thank you.

Hi there.

Do you mean:

?

If so, you can't change it to , as the first term is now different.

You could however change it to , as you are just multiplying the second term by which equals .

Hope this helps

it does, thank you