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# C3 Simpllify Differentiation watch

1. Hi Guys I am struggling to see how the following equation simplifies as the answer on the bottom!

Can anyone show me where to start please?

2. .
Just taking out the factor common to both terms. Then obviously simplify further to get the result.
3. (Original post by B_9710)
.
Just taking out the factor common to both terms. Then obviously simplify further to get the result.
hello thanks for the reply, I am trying to pull (3x+1)^4 as a common factor out but i'd really love to see 18 where that comes from?
4. (Original post by MLW12345)
hello thanks for the reply, I am trying to pull (3x+1)^4 as a common factor out but i'd really love to see 18 where that comes from?
In the square brackets you have:
[ (3x+1) + 15x ].

This can be simplified, as you have two sets of Xs, the 3x and the 15x. When you add them, you get 18x.
So your final result for the square brackets will be [ 18x + 1 ].
5. (Original post by JLegion)
In the square brackets you have:
[ (3x+1) + 15x ].

This can be simplified, as you have two sets of Xs, the 3x and the 15x. When you add them, you get 18x.
So your final result for the square brackets will be [ 18x + 1 ].

Got it thank you I could not see this until then thank you

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