Question

verify that 1, - 1, - 2 zeros of f (x)=x^3+2x^2-x-2 also verify the relationship between zeros and represent​

Answer 1

1,-1,-2 all are zeroes of the given cubic polynomial

Step-by-step explanation:

1 is the zero of the polynomial

1^3+2(1)^2-1-2=0

-1 is the zero of the polynomial

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

-1+2+1-2

0

-2 is the zero of the polynomial

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

-8+8+2-2

=0

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