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Sagot :

Bonjour

A = (2x - 1) (5x - 4)

A = 10x² - 8x - 5x + 4

A = 10x² - 13x + 4

B = (4x - 1)² + 3x - 2

B = 16x² - 8x + 1 + 3x - 2

B = 16x² - 5x - 1

C = (2x + 4)² + (5x - 3)²

C = 4x² + 16x + 16 + 25x² - 30x + 9

C = 4x² + 25x² + 16x - 30x + 16 + 9

C = 29x²- 14x + 25

D = (x + 1) (x - 1) - (3 - 2x)²

D = x² - 1 - (9 - 12x + 4x²)

D = x² - 1 - 9 + 12x - 4x²

D = x² - 4x² + 12x - 1 - 9

D = - 3x² + 12x - 10

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