Question

determine which of the following polynomials has (x+1) as a factor 2x³_9x²+x+12

Answer 1

x+1

x = -1

put the value of -1

2x-1 +9x-1-1+12

-2+-9-1+12

-12+12

0

therefore x+1 is a factor of 2x³_9x²+x+12

Answer 2

Answer:

x+1 =0

x=-1

2 × -1³- 9 × -1² + -1 + 12

-2 -9-1+12

-11+11

0