Factorise:y2/9 - 9 – InterviewSolution

1.	Factorise:y2/9 - 9
Answer» y²/9 - 9 = (y/3)² - (3)² = (y/3 + 3)(y/3 - 3) (Since a² – b² = (a + b) (a – b))

Factorise:y2/9 - 9

Answer»

y²/9 - 9

= (y/3)² - (3)²

= (y/3 + 3)(y/3 - 3) (Since a² – b² = (a + b) (a – b))