Sagot :
Bonjour !
12×y= 12y
a×a= a²
2×8+9×b= 16 + 9b
a×b×c+5×d+y×x= abc + 5d + yx
2×x×(3×y+1) = 2x(3y + 1)
2+5×x-6×(4×3-y)= 2 + 5x - 6(12 - y)
x×x+x= x² + x
J'espère t'avoir aidé. Bon courage !
bjr
12×y= 12y
a×a= a²
2×8+9×b= 9b + 16
a×b×c + 5×d + y×x= abc + 5d + yx
2×x×(3×y+1) = = 2x (3y+1)
2 + 5×x - 6×(4×3-y)= 2 +5x - 6(12-y)
x×x+x= x² + x