(5p+7q)² - (7p+5q)²

Asked by rupalipramanick1980 | 5th Jun, 2020, 09:32: PM

Expert Answer:

(5p+7q)² - (7p+5q)²
=(5p + 7q + 7p + 5q) (5p + 7q - 7p - 5q)   ...m2 - n2 = (m + n)(m - n)
 
= (12p + 12q)(-2p + 2q)
= 2 × 12 × (q - p)(q + p)

 

Answered by Yasmeen Khan | 5th Jun, 2020, 09:53: PM