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Sagot :

ELADLKENZA

Réponse:

Bonjour/bonsoir,

ex1

A=5×a+8

=5a+8

B=10-2×a

=10-2a

C=4(a+2)

=4a+8

D=7×a×3

=21a

ex2

A=2n+4 n=3

=2×3+4

=6+4

A=10

B=c² c=5

=5²

=5×5

=25

C=a(a+5) a=6

=6(6+5)

=36+30

=66

D=b(11-b) b=4

=4(11-4)

=44-16

=28

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