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Sagot :

A= 3xa+3x7 =3a+21
B=6x3y-6x4 =18y-24
C=-12x2n-12x1=-24n-12
D=(7x)x(3x)+(7x)x5= 21x au carré+35x
E= 6x x-6x4=6x-24
F=(8x)x(2x) +(8x)x3 -(x au carré +3x-9)+15
=16x au carré +24x-x au carré +3x -9 +15
=15x au carré +27x+6
MANONSAMPINO

Réponse:

À. 3 X a+7=3a+7 B. 6 X 3y-4. c. -12 X 2n+1

=18y-4. =-24n+1

D.7x X 3x +5. E. 6 X x +6 X 4

=21 au carré +5. =6x +24

=441+5

=446

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