Sagot :
Réponse:
A= 21X *14
B= 21x +14 +4
B=21X +18
C=10(2X-5)
C=20X-50
Voici les réponses
A =7x(3X x 2)
= 7 x 6X
A = 42X
B=7(3X+2)+4
= ( 7 x 3X + 7 x 2 ) + 4
= 21X +14 +4
B=21X + 18
C=7+3(2X-5)
=7+(3(2X-5)
=7+(6X -15)
= 6X - 15 +7
C =6X - 8
Réponse:
A= 21X *14
B= 21x +14 +4
B=21X +18
C=10(2X-5)
C=20X-50
Voici les réponses
A =7x(3X x 2)
= 7 x 6X
A = 42X
B=7(3X+2)+4
= ( 7 x 3X + 7 x 2 ) + 4
= 21X +14 +4
B=21X + 18
C=7+3(2X-5)
=7+(3(2X-5)
=7+(6X -15)
= 6X - 15 +7
C =6X - 8