Odpowiedzi

Najlepsza Odpowiedź!
2009-12-09T14:31:11+01:00
A) -3ab(-6a²-2ab-b²)-(3ab²+6a²b²)=
=-3ab-6a²-2ab-b²-3ab²-6a²b²=
=-9ab²-5ab-6a²-b²


b) 6a(5a²-8b)-10a(6b+7a²)-3ab=
= 6a ×5a²-8b-10a × 6b -7a²-3ab=
=30a³-8b-60ab-7a²-3ab=
= 23a²-63ab-7a²
2 3 2