check whether (x+1) is a factor of (x cubic +1)
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✒️Your Question :-
➡️ check whether (x+1) is a factor of (x cubic +1)
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✒️Answer :-
f(x) = x^3 + x^2 - x-1
f(-1)= (-1)^3 + (-1)^2 - (-1) - 1
= - 1 +1 +1 - 1
= 0
hence , it is a factor
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➡️ hope this helps you ❗️❗️
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