Question

find the find the zeros of x cube minus 15 X square + 66 x+ 80 ​

Answer 1

Answer:

Step-by-step explanation:

15x + 66x + 80=161

x= 161 by 15= 4 x= 4

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Answer 2

Answer:

Step-by-step explanation:

x^3-15x^2+66x+80

just check the signs of the coefficients

it could be -80

x^3-15x^2+66x-80

put x=2

8-60+132-80

=0

so

(x-2)(x^2-13x+40)

(x-2)(x^2-5x-8x+40)

(x-2)(x-5)(x-8)

so the zeros of the polynomil are 2,5,8