Question

Podemos afirmar que x notrinomio X2-4x+4 dado é:


(A) 0
(B) 1
(C)2
(D)3
(E)4

Answer 1

c) 2

x²-4x+4

a=1  b=-4  c=4

∆=b² - 4.a.c

∆= -4² - 4.1.4  

∆= 16 - 16

∆= 0

X= -b +/- √∆

``````````2```````````

X= -(-4) +/- √0

``````````2```````````

X1= 4 + 0 = 4 = 2  

  `````2`````| ``2``

X2= 4 - 0 = 4 = 2  

   `````2`````| ``2``