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Sagot :

Bonjour

1)

G = (- 4x + 5) - (2x + 3) (x + 7)

G = (- 4 * 3 + 5) - (2 * 3 + 3) (3 + 7)

G = (- 12 + 5) - (6 + 3) * 10

G = (- 7) - 9 * 10

G = - 7 - 90

G = - 97

2)

G = (- 4x + 5) - (2x + 3) (x + 7)

G = - 4x + 5 - (2x² + 14x + 3x + 21)

G = - 4x + 5 - 2x² - 14x - 3x - 21

G = - 2x² - 4x - 14x - 3x + 5 - 21

G = - 2x² - 21x - 16.

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