(1+4x)^7 i need to fully expand.(adsbygoogle = window.adsbygoogle || []).push({});

il use (4c0) for 4 Ncr 0.

(4c0)1^4 + (4c1) 1^3 + 4x + (4c2) 1^2 4x^2 + (4c3) 1 + 4x^3 +

(4c4) 4x^4.

this gives the completely wrong answer.

i know this isn't the way your meant to do it, but i can't remember what's wrong here.

can someone tell me how to do this.. thanks :P

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# Homework Help: Binomial Expansion

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