Question

Sois S = (2t - 5) + (2t - 5)(x - 1) - x(t - 5)

a. Montre que S = tx



b. Calcule S pour x = 2507/3012 et t = 3012/2507





Urgent svp ):

Answer 1

Respuesta:

$S = (2t - 5) + (2t - 5)(x - 1) - x(t - 5) \\ s = (2t - 5) + (2tx - 2t - 5x + 5) - (xt + 5x) \\ s = 2t - 5 + 2tx - 2t - 5x + 5 - xt - 5x \\ s = tx - 10x$