化简:-3ab+7-2a2-9ab-3.
问题描述:
化简:-3ab+7-2a2-9ab-3.
答
-3ab+7-2a2-9ab-3
=-2a2-12ab+4.
化简:-3ab+7-2a2-9ab-3.
-3ab+7-2a2-9ab-3
=-2a2-12ab+4.