Asked by vicky

if x+1 is a factor of x^3-2x^2+5x+c, find the value of c.
Answered by Reiny
let f(x) = x^3-2x^2+5x+c

if x+1 is a factor, then
f(-1) = 0
-1 -2 -5 + c = 0
c = 8
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