Question

verify that 1,minus 1 .minus 3 are the 0 of the cubic polynomial xcube minus three xsquare minus x minus three​

Answer 1

Answer:

To verify

minus 1 and minus 3 are the zeros

x^3 - 3x^2 - x

1st x = -1

( -1 )^3 - 3 ( -1 )^2 - ( -1 )

-1 - 3 + 1

- 4 not equal to 0

hence minus 1 is not the zero

2nd x = - 3

( -3 )^3 - 3 ( -3 )^2 - ( -3 )

- 27 - 27 + 3

- 54 + 3

- 51 is not equal to zero

hence minus 3 is not the zero of the given polynomial

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