2 x² + 3 x - 2 = 0
si x = 0 , l'expression = - 2
si x = - 2
2 ( - 2 )² + 3 *-2 - 2
= 8 - 6 - 2
= 0
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Verified answer
2 x² + 3 x - 2 = 0
si x = 0 , l'expression = - 2
si x = - 2
2 ( - 2 )² + 3 *-2 - 2
= 8 - 6 - 2
= 0