Question

Let f(x)=4x^7+x^5+3x^2-2x+c. For what value of c is f(-1)=0?

Answer 1

if f(x) = 4x^7+x^5+3x^2-2x+c

f(-1) = -4 -1 + 3 +2 +c
= 0
c = 0