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Sagot :

Bonjour

Simplifier les expressions suivantes :

A = 7x² - (5x - x²) + 2x

A = 7x² - 5x + x² + 2x

A = 7x² + x² - 5x + 2x

A = 8x² - 3x

B = - 4x² + 9x + (x - 3x²) - 4x

B = - 4x² + 9x + x - 3x² - 4x

B = - 7x² - 3x² + 9x + x - 4x

B = - 10x² + 6x

C = x - 2x² + x (4 - 5x) - (2x² + 3x)

C = x - 2x² + 4x - 5x² - 2x² - 3x

C = - 2x² - 2x² - 5x² + x + 4x - 3x

C = - 9x² + 2x.

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