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Sagot :

Réponse:

bonjour

Explications étape par étape:

(3x -2)² - (2x +1)² = 0

((3x)² -2×3x×2 + 2²) - ((2x)² +2×2x×1 + 1²) = 0

9x² -12x + 4 - (4x² + 4x + 1) = 0

9x² -12x + 4 - 4x² - 4x - 1 = 0

5x² -16x + 3 = 0

5x² -16x + 3 = 0

delta = b² - 4ac

delta = (-16)² -4×5×3

= 196

x1 = -b -racine de delta/ 2a

x1 = 16 - racine de 196/ 10

x1 = 1/5

x2 = -b + racine de delta/ 2a

x2 = 16 + racine de 196/ 10

x2 = 3

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