Question

SEM CAUCULAR AS RAIZES DA EQUÇÃO X² -2X -1= A ZERO DETERMINE A SOMA DOS INVERSOS DESSAS RAÍZES .

Answer 1

x^2 - 2x - 1 = 0
a=1 b=-2 c=-1
formula de delta:
delta = b^2 - 4ac
delta = (-2)^2 - 4(1)(-1)
delta = 4 - 4 (-1)
delta = 4 +4
delta = 8
formula baskara
x = - b +,- \/delta / 2 a
x = - (-2)+,- \/8 / 2 (1)
x = 2 +,- 2\/2 / 2
x = 2 +,- 2(1,41) / 2
x = 2 +,- 2,82 / 2
x1 = 2 + 2,82 / 2》x1 = 4,82 / 2》x1=2,41
x2 = 2 - 2,82 / 2》x2 =-0,82 / 2》x2=-0,41