a2+b2-2a+6b+10=0求a+b

问题描述:

a2+b2-2a+6b+10=0求a+b

a^2+b^2-2a+6b+10=0
a^2-2a+1+b^2+6b+9=0
(a-1)^2+(b+3)^2=0
(a-1)^2=0,(b+3)^2=0
a=1,b=-3
a+b
=1-3
=-2