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Sagot :

NANABEYAKA10

Explications étape par étape:

4 ( 2x + 3 ) = 0 7x - 5 = 0

8x + 12 = 0 7x - 5 = 0

8x = 0 - 12 7x = 0 + 5

8x = -12 7x = 5

8x/8 = -12/8 7x/7 = 5/7

x = -12/8 x = 5/7

JULIAMINNITI5

Réponse:

4 (2 ×(-1,5) + 3)(7 × (-1,5) - 5) = 0 car :

4 (2 ×(-1,5) + 3)(7 × (-1,5) - 5)

= 4 ( (-3) + 3)( (-10,5) - 5)

= 4 × 0 × (-15,5)

= 0

DONC : x = -1,5

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