1.x^2+3x+2=0
(x+1)(x+2)=0
x=-1或x=-2
所以
1+a+b+2=0
16+4a+2b+2=0
解得
a=-6
b=3
2.
2(180-x)+180-x-24>=180
(180-x)+2(180-x-24)