ElReyQwert ElReyQwert

27-04-2017
Mathematics

contestada

which of the following is a root of the polynomial function below
a. 2+i
b.1
c.2
d. -2+i

Respuesta :

treypad2702 treypad2702

27-04-2017

x3 - 3x2 + 2=(x-1)( x^2-2x-2)
x^2-2x-2
= x^2-2x+1-1-2
= ( x^2-2x+1)-3
= (x-1)^2-3=0
gives
(x-1)^2=3
x-1= +/- sqrt3
x= 1 +/- sqrt3
ONLY C is the answer

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