Question

Efetue e encontre as raizes:

-x²+6x-5=0

Answer 1

delta=6^2 -4 × (-1) × (-5)

delta= 36 - 20

delta= 16

x = -6 + raiz de 16 -6 + 4

-------------------------- = ---------------

2 × (-1) -2

x1= -6-4 = -8 = - 4

2 2

x2 = -6+4 = -2 = -1

2 2