CBSE Class 9 Answered
use a suitable identity to factorise 27p3+8q3+54p2q+36pq2
Asked by hksingh3456 | 30 Jan, 2019, 09:09: PM
Expert Answer
we know, (a+b)3 = a3 + 3a2b + 3ab2 + b3 ..................(1)
Given expression : 27p3 + 8q3 +54p2q +36pq2 = (3p)3 + (2q)3 +3(3p)2(2q) +3(3p)(2q)2 ...............(2)
by comparing (1) and (2), we can write , 27p3 + 8q3 +54p2q +36pq2 = (3p +2q)3
Answered by Thiyagarajan K | 31 Jan, 2019, 09:41: AM
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