В = 2(x- 8) — (5 - 3х) Calculée svp

B = 2 * x + 2 * (-8) - 1 * 5 - 1 * (-3x)

   = 2x - 16 - 5 + 3x

   = 2x + 3x - 16 - 5

   =     5x     -   21

puisque k(a+b) = ka+kb (cours)

Bonsoir,

Simplifier :

B = 2(x-8)-(5-3x)

B = 2x-16-(5-3x)

B = 2x-16-5+3x

B = 5x-16-5

B = 5x-21

Bonne soirée.