7m*(7m+7)-(7m-7)*(7+7m); m=14,9
(7m+7)*(7m-(7m-7))
7*(m+1)*(7m-7m+7)
7*(m+1)*7
49*(m+1)
49*(14,9+1)=779,1
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
7m*(7m+7)-(7m-7)*(7+7m); m=14,9
(7m+7)*(7m-(7m-7))
7*(m+1)*(7m-7m+7)
7*(m+1)*7
49*(m+1)
49*(14,9+1)=779,1