sndrstpnk sndrstpnk

17-04-2019
Mathematics

contestada

what are the zeros of the polynomial function
f(x) = x^3 + x^2 - 20x

choices:
0, -5, -4
0, -5, 4
0, 5, -4
0, 5, 4

Respuesta :

mkryukova19 mkryukova19

17-04-2019

Answer:

(b) 0,-5,4

Step-by-step explanation:

[tex]f(x)=x^3+x^2-20x\\x^3+x^2-20x=0\\x(x^2+x-20)=0\\x(x+5)(x-4)=0\\x=0, x+5=0, x-4=0\\x=0,x=-5,x=4[/tex]

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