Sagot :
2×(x+y×6)
=2×(x+6y)
=2(x+6y)
=(2×x)+(2×6y)
=2x+12y
(3×a×b+a×a)×4
=(3ab+a^2)4
=(4×3ab)+(4×a^2)
=12ab+4a^2
5×x×x×x-9×y×2
=5×x^3-9y×2
=5x^3-18y
2×(x+y×6)
=2×(x+6y)
=2(x+6y)
=(2×x)+(2×6y)
=2x+12y
(3×a×b+a×a)×4
=(3ab+a^2)4
=(4×3ab)+(4×a^2)
=12ab+4a^2
5×x×x×x-9×y×2
=5×x^3-9y×2
=5x^3-18y