Question

2(x + 4) - 3/x = x - 1

Answer 1

Resposta:

Explicação passo a passo:

2x+8 - 3/x = x-1

[X.(2x+8) - 3]/x= x.(x-1)/x

2x^2 + 8x - 3 = x^2 - x

2x^2 - x^2 + 8x + x - 3 = 0

x^2 + 9x - 3 = 0

a=1 ; b = 9; c = - 3

∆= b^2 - 4ac

∆= 9^2 - 4.1.(-3)

∆= 81+12

∆= 93

x = (- b +/- √∆)/2a

X = (-9 +/- √93)/2.1

X = (-9 +/- √93/2

R.:

X' = (-9+√93)/2

X" =(-9-√93)/2