化简(3b+2a)(3a+b)-6ab
问题描述:
化简(3b+2a)(3a+b)-6ab
答
(3b+2a)(3a+b)-6ab
=9ab+3b²+6a²+2ab-6ab
=6a²+5ab+3b²
答
(3b+2a)(3a+b)-6ab
=9ab+3b^2+6a^2+2ab-6ab
=6a^2+5ab+3b^2