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Sagot :

INESPARIS2024

Réponse :

A = -7x(2 - 3x)

A = -7x*2 -7x*(-3x)

A = -14x + 21x²

B = (-3x + 7)(4x - 1)

B = -3x*4x -3x*(-1) + 7*4x + 7*(-1)

B = -12x² + 3x + 28x - 7

B = -12x² + 31x - 7

J'espère avoir pu t'aider !

TRISTANJA
A = -7x(2 - 3x)
= -7x x2 -7x x (-3x)
= -14x + 21x^2

B = (-3x + 7)(4x - 1)
= -3x x 4x -3x x-1 + 7 x 4x + 7 x -1
= -12x^2 + 3x + 28x - 7
= 12x^2 + 31x - 7
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