Question

plz answer the given question in photograph

Answer 1

verify:
4(1)-3(1)+2(1)-5(1)+1=4-3+2-5+1=-3
since -3is not equal to 0, 1 is not a zero

Answer 2

4(1)^4-3(1)^3+2(1)^2-5(1)+1
4-3+2-5+1
1+2-5+1
3-5+1
-2+1
= -1
thus 1 is not a zero of this polynomial