Monday

October 20, 2014

October 20, 2014

Posted by **George** on Sunday, March 3, 2013 at 9:16am.

I expanded the second bracket using binomial expansion and got 1 -6x +27x^2 -108x^3

how do I combine (x+4) with the expansion?

Any help would be appreciated.

- maths -
**Steve**, Sunday, March 3, 2013 at 1:47pmjust multiply out as usual, taking only the firet 3 terms:

(1 -6x +27x^2 -108x^3)(4+x)

= (1 -6x +27x^2 -108x^3)*4

+ (1 -6x +27x^2 -108x^3)*x

= 4 - 24x + 108x^2 - ...

+ x - 6x^2 + 27x^3 - ...

----------------------------------

4 - 23x + 102x^2 + ...

**Answer this Question**

**Related Questions**

binomial expansion - how do you expand the following as a series of ascending ...

algebra - Find 1.The first 4 terms of the binomial expansion in ascending powers...

maths - in the binomial expansion of (1+x/k)^n, where k is a constant and n is a...

same type of binomial theorem question - Question: Find the first 3 terms in the...

Binomial expansion - The coefficient of x^2 in the expansion of (4-3x)^n as a ...

maths - Use binomial theorem to to expand squareroot of 4+x in ascending powers ...

CORE MATHS - The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ...

maths - Obtain the binomial expansion of (2-x) (1+1/2x)^8 in ascending powers of...

algebra - Find 1. the binomial expansion of (3+2x)^5 simplifying terms. Hence ...

Maths - Write the first four terms in the binomial expansion of ( 1 + x/2)to the...