Hello !!
4 *5x = 20x
4x * 5 = 20x
4x + 5x = 9x
4x * 5x = 20x²
4x - 5x = - x
bonne journée
Bonjour !
note : " * " signifie la multiplication
a) 4 + 5x = Plus rien à faite
b) 4 X 5x = (4*5) * x= 20x
c) 4x X 5 = (4*5) * x= 20x
d) 4x + 5x = (4+5) * x = 9x
e) 4x X 5x = (4*5) * (x*x) = 20x²
f) 4x- 5x = (4-5) * x = -1x = -x
Voilà !