#1**+2 **

think about which terms could be included

x^4, x^3, x^2 will all tead to terms the power of x bigger than 1

so the only bit that could be relevant is (x+1)^4

the general term in the expansion is \(\binom{4}{n}x^n\) where x can be 0,1,2,3,or 4

so the term you want is \(\binom{4}{1}x^1=4x\)

so the coefficint of x is 4

Melody Mar 28, 2022