Question

Factorise using the identity: 25x2- (y + z)2

Answer 1

Answer:

we can factorize by identity: a²-b² = (a+b)(a-b)

consider a = 5x and b = y+z

=> 25x² - (y+z)² = a²-b²

=> 25x² - (y+z)² = (a+b)(a-b)

=> 25x² - (y+z)² = (5x+y+z)(5x-y-z)