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# C3 Differentiation Simplifying expressions help watch

1. I get how to use the different rules however I'm not sure what the heck is going on when I need to factorise my expression. For example:

4x2(2x+1)50 + 2x(2x+1)51

It apparently simplifies to:

x(2x+1)50(4x+1)

HOW?!

(See attachment for better layout of questions)

Please help me
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2. (Original post by lucaT)
I get how to use the different rules however I'm not sure what the heck is going on when I need to factorise my expression. For example:

4x2(2x+1)50 + 2x(2x+1)51

It apparently simplifies to:

x(2x+1)50(4x+1)

HOW?!

(See attachment for better layout of questions)

Please help me
Think back to when you first learnt how to factorise:

What are the common factors of each of the two terms? You can take these "outside the bracket".

If you're still unsure, try factorising this

then realise that . Please post all your working if you get stuck.
3. (Original post by Notnek)
Think back to when you first learnt how to factorise:

What are the common factors of each of the two terms? You can take these "outside the bracket".

If you're still unsure, try factorising this

then realise that . Please post all your working if you get stuck.
I do believe there's a mistake. I think should be
4. (Original post by Desmos)
I do believe there's a mistake. I think should be
Oops I didn't notice the mistake. This could be why the OP is confused.

Thanks
5. (Original post by Notnek)
Think back to when you first learnt how to factorise:

What are the common factors of each of the two terms? You can take these "outside the bracket".

If you're still unsure, try factorising this

then realise that . Please post all your working if you get stuck.
Thank you, I'm using if I get too stuck now

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