Respuesta :

devishri1977

Answer:

Step-by-step explanation:

2x² + x -1 = 0

x² + x² + x -1 = 0

(x²  - 1) + x²  + x  =0

(x + 1) (x - 1) + x(x + 1) =0

(x+1) (x - 1 + x) = 0

(x + 1)(2x - 1) = 0

myvixwkaua

Answer: x=1/2 & x=-1

Step-by-step explanation: