1)х2-64=0
х2=64
х=+-8
2) 64-х2=0
-х2=-64
х=+-8
3)м-2b/5b+7м - 7/5
5(м-2b)-7(5b+7м)/5(5b+7м)
5м-10b-35b-49м/5(5b+7м)
-44m-45b/5(5b+7m)
- 44m+45b/25b+35m
4)2d-4y/5d+5y - 7d+3y/2d-3y
(2d-3y)(2d-4y)-(5d+5y)(7d+3y)/(5d+5y)(2d-3y)
4d2-8dy-6dy+12y2-(35d2+15dy+35dy+15y2)/10d2-15dy+10dy-15y2
4d2-8dy-6dy+12y2-35d2-50dy-15y2/10d2-5dy-15y2
-31d2-64dy-3y2/10d2-5dy-15y2
5)
2m-6a/7m-3a+ 8m-5a/a+m
(a+m)(2m-6a)+(7m-3a)(8m-5a)/(7m-3a)(a+m)
2am-6a2+2m2-6am+56m2-35am-24am+15a2/7am+7m2-3a2-3am
-63am+9a2+58m2/4am+7m2-3a2
воот