c=17/80
Объяснение:
(2,5-8c)^2-(8c-1,5)(8c+1,5)=0
(5/2-8с)^2-(64с^2-1,5^2)=0
25/4-40c+64c^2-(64c^2-9/4)=0
25/4-40c+64c^2-64c^2=9/4=0
17/2-40c=0
-40c=-17/2
c=17/80
Объяснение:
(2,5-8c)^2-(8c-1,5)(8c+1,5)=0
(5/2-8с)^2-(64с^2-1,5^2)=0
25/4-40c+64c^2-(64c^2-9/4)=0
25/4-40c+64c^2-64c^2=9/4=0
17/2-40c=0
-40c=-17/2
c=17/80