Easy Help with Exponentials? (1 Viewer)

[Redyapper]

Hi,

I haven't done exponentials for a while, but I was looking through some of my old work, and saw this:

I'd figured out that y''=e^x(x+1)+e^x
and then I wrote that that was equal to e^x(x+2)

The rest of the question, using this result, was correct. I have no idea how I got the x+2 part, and what happened to the +e^x bit.

I'm sure it's something really obvious.

 

[HeroicPandas]

Hi,

I haven't done exponentials for a while, but I was looking through some of my old work, and saw this:

I'd figured out that y''=e^x(x+1)+e^x
and then I wrote that that was equal to e^x(x+2)

The rest of the question, using this result, was correct. I have no idea how I got the x+2 part, and what happened to the +e^x bit.

I'm sure it's something really obvious.

Apply the distributive law.



Factorise out.