加油!
17.
a^2 -6a +9 +b^2 -10b +25 =0
(a-3)^2 +(b-5)^2 =0
=> a = 3 、b = 5
=> 2a+3b = 21
18.
a^2 -4a +4 +b^2 -10b +25 =0
(a-2)^2 +(b-5)^2 =0
=> a = 2 、b = 5
=> a+b = 7
加油!
17.
a^2 -6a +9 +b^2 -10b +25 =0
(a-3)^2 +(b-5)^2 =0
=> a = 3 、b = 5
=> 2a+3b = 21
18.
a^2 -4a +4 +b^2 -10b +25 =0
(a-2)^2 +(b-5)^2 =0
=> a = 2 、b = 5
=> a+b = 7
看了這個問題的人
也有瀏覽這些問題喔😉