Sagot :
Réponse:
Bonjour!
A)
10x ×10x + 10x × 9+1×10x+1×9
100x²+ 90x+10x+9
100x²+100x+9
B) -9x ×3x -9x × -6 -7×3x -7× -6
-27x²+ 54x -21x +42
-27x²+33x +42
C)3× -10x +3×-4 -9x ×-10x -9x×-4
-30x -12 +90x²+34x
90x²+4x-12
bonne soirée !
;)
Réponse:
Bonjour!
A)
10x ×10x + 10x × 9+1×10x+1×9
100x²+ 90x+10x+9
100x²+100x+9
B) -9x ×3x -9x × -6 -7×3x -7× -6
-27x²+ 54x -21x +42
-27x²+33x +42
C)3× -10x +3×-4 -9x ×-10x -9x×-4
-30x -12 +90x²+34x
90x²+4x-12
bonne soirée !
;)