1.

Solve : - x2 + x - 2=0​

Answer» ONG>ANSWER:

{x}^{2}  + x - 2 \\  \\  {x }^{2}  + 2x - x - 2 \\ x(x + 2) - 1(x + 2)

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



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