Dividing (a+b)2+(a−b)2 by a2+b2 gives:
1
2
a+b
2(a+b)
(a+b)2+(a−b)2 = (a2+b2+2ab)+(a2+b2−2ab)=2(a2+b2)
(a+b)2+(a−b)2a2+b2=2
Dividing (a+b)2+(a−b)2 by (a2+b2) gives ___
The following facts are available :
Factorising and dividing a2+7a+10 by (a + 5) gives: