Mathematics
Factorise :
a2 - 81(b - c)2
Factorisation
21 Likes
Answer
Given,
a2 - 81(b - c)2
= (a)2 - [9(b - c)]2
= [a + 9(b - c)][a - 9(b - c)]
= (a + 9b - 9c)(a - 9b + 9c).
Hence, a2 - 81(b - c)2 = (a + 9b - 9c)(a - 9b + 9c).
Answered By
12 Likes
|