Find the first 4 term of the binomial expansion (2-4x)^5
Step 1: Look at formula in formula booklet provided and write out formula.
Formula: (a+b)n= an+ nc1an-1b + nC2an-1b2+...+nCran-rbr
In this question our a=2 our b=-4x and our n=5
Therefore our first 4 terms are:
45 + 524(-4x) + 1023(-4x)2 + 1022(-4x)3
= 32 - 320x +1280x2 -2560x3
CR
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