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Sagot :

Réponse:

3(x+5)

= 3 × x + 3 × 5

= 3x + 15

5(x+7)

= 5 × x + 5 × 7

= 5x + 35

2(4x+7)

= 2 × 4x + 2 × 7

= 8x + 14

6(5x-2)

= 6 × 5x + 6 × (-2)

= 30x + (-12)

= 30x - 12

-3(2x-7)

= -3 × 2x + (-3) × (-7)

= -6x + 21

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