Question

marque a alternativa correta:
　2X² - 10X +8 = 0

a) ( 4,1)
b) (2,1)
c) (3,4)
d) (5,1 )
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Answer 1

Resposta:

∆=(-10^2)-4.2.8

∆=100-64

∆=36

x=-(-10)+-√36/2.(2)

x=10+-6/4

x'=10+6/4 x'=4

x"=10-6/4 x"=1

Letra a (4,1)