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Sagot :

Réponse :Bonjour,

1) A = 2x² + 5x + 6x + 15 = 2x² + 11x + 15

2) Pour x = 2, A = 2*2² + 11*2 + 15 = 8 + 22 + 15 = 30 + 15 = 45

3) 4x+ 3 = 6x + 2

4x-6x = 2-3

-x = -1

x= 1.

Bon courage.

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