1.

Check whether x+1 is a factor of 5x³+x²-5x-1 using factor theorem.​

Answer»

ANSWER:

5x³+x²-5x-1.

x+1=0.

x=-1.

5(-1)³+(-1)²-5(-1)-1.

5(-1)+(1)+5-1. (Because -×-=+).

-5+1+5-1. (Because +×-=-).

0. (Because +×-=- & -×+=- so, -5+5 & +1-1 will CANCEL).

I think this is your answer.



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