Kantai Collection
19/07/2017 at 14:27-
Aim Egst 19/07/2017 at 14:34surf before ask Câu hỏi của Mai Nguyễn Bảo Ngọc - Toán lớp 8 | Học trực tuyến
Kantai Collection selected this answer. -
A = (x2 + y2)3 + (z2 - x2)3 - (y2 + z2)3
A = [(x2 + y2) + (z2 - x)2]3 + 3.(x2 + y2).(z2 - x2).(x2 + y2 + z2 - x2) - (y2 + z2)3
A = (y2 + z2)3 + 3.(x2 + y2).(x + z)(z - x).(y2 + z2) - (y2 + z2)3
A = 3.(x2 + y2).(x + z)(z - x).(y2 + z2)
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Nguyễn Huy Thắng 19/07/2017 at 14:37Kayasari Ryuunosuke:Congratulation!! You're wrong