Answer:
45-35-9-3+2 = 45-47+2 = 0
if the sum of coefficients is equal to 0, 1 is the factor of the polynomial
you can find other integer factors by looking on the integer factors of 45, so -3 will be a guess or you use use Horner, find how does this polynomial look like after factoring out (x-1) and try to group or other technic
