Question

Aurora

算到一半思考突然卡住了，請知道後面算法的同學協助，謝謝！

=
3y = x² + ax + b x
(A)-1
頂点(-/2/2,-1)
(B)0
(글)=-1 a+b=-1
12
#
時,y有最小值1,則30+46= ?
(C)1
(D)2
=
> ///
a+b= -20-46=5