已知3a-5b+19=0,a+8b-1=0,求(4a+3b)＾2-8a-6b的值
问题描述：
已知3a-5b+19=0,a+8b-1=0,求(4a+3b)＾2-8a-6b的值
答
3a-5b+19=0(1)
a+8b-1=0 (2)
(1)+(2)
4a+3b+18=0
4a+3b=-18
(4a+3b)²-8a-6b
=(4a+3b)²-2(4a+3b)
=(-18)²-2(-18)
=360