Question

what should we subtarcted from the polynomial x^2 - 16x + 30 so that x-15 is the factor of resulting polynomial

Answer 1

First subtract the two polynomial and the remainder we got  we be the answer

Answer 2

P(x)=x2 -16x+30,

p(15)=152 -16*15+30

p(15)=225-240+30

p(15)=15

therefore 15 should be subtracted from p(x) so that 15 is the zero of the resulting polynomial