Question

determine a raiz da equação -x2+5x-8=0
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Answer 1

DELTA

∆=b²-4ac

∆ = 5²-4.(-1).(-8)∆=25-4.8

∆=9

BHASKARA

-b+-√∆

________

2.a

-5+-√9

-------------

2. (-1 )

-5+-3

---------

-2

x1= -5+3 -2

----- = ---- = 1

-2. -2

x2= -5-3 -8

----- = ---- = -4

-2 -2