what is the remainder of 4x^80-2x^60+2x^50+7x^37-2x^11+9 divided by x-1

let x=1

f(1)=4+2+7-2+9=20

the remainder is 20. Check my work. Read this.
http://www.intmath.com/equations-of-higher-degree/2-factor-remainder-theorems.php