`a(a+b-c) - bc`

Factorise : a(a-2b-c)+2bc

bc - b - c - b - c c b

If a,b,c are in AP, show that (a(b+c))/(bc) , (b (c+a))/(ca), (c(a+b))/(ab) , are also in AP.

Sum of a – b + ab, b + c – bc and c – a – ac is

Add the following: a-b+ab, b-c+bc, c-a + ac

Add the following: a – b + ab, b – c + bc, c – a + ac

If a,b,c are in A.P. prove that the following are also in A.P. (a(b+c))/(bc) , (b(c+a))/(ca) , (c(a+b))/(ab)