Question

（a+b）2次方=？，过程

Answer 1

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

望采纳，谢谢！

Answer 2

=a^2+2ab十b^2

追问

解题过程

追答

=(a十b)(a+b)
=a^2十ab+ab+b^2
=a^2十2ab+b^2