Réponses

2013-10-09T15:21:00+02:00
= 3(10-4x) 
= 3 * 10 + 3 * (-4x)
= 30 - 12x

= -7(3t-5)
= -7 * 3t + (-7) * (-5)
= -21t + 35

= -4x(-5x+6)
= -4x * (-5x) + (-4x) * 6
 20x^{2} - 24x