Question

a-b=8,ab=20,则a^2+b^2=?

跪求，数学题，在线等啊，谢谢，好心的大侠帮帮忙吧！跪谢！

Answer 1

a^2+b^2
=a^2-2ab+b^2+2ab
=(a-b)^2+2ab

=8^2+2*20
=104

Answer 2

a^2 b^2=(a-b)^2 2ab=64 40=104

Answer 3

a^2+b^2
=a²-2ab+b²+2ab
=(a-b)²+2ab
=8²+2×20
=104

Answer 4