已知a+b=3,ab=2,则式子(4ab+2a+3b)-(a+2b)的值

问题描述:

已知a+b=3,ab=2,则式子(4ab+2a+3b)-(a+2b)的值

(4ab+2a+3b)-(a+2b)
=4ab+2a+3b-a-2b
=4ab+a+b
=4×2+3
=11