Factories: 63a2b2 – 7 – InterviewSolution

1.	Factories: 63a2b2 – 7
Answer» 63a²b² – 7 = 7(9a²b² – 1) By using the formula a² – b² = (a + b)(a – b) We get, 63a²b² – 7 = 7(9a²b² – 1) = 7{(3ab)² – (1)²} = 7(3ab + 1)(3ab – 1)

Factories: 63a2b2 – 7

Answer»

63a²b² – 7

= 7(9a²b² – 1)

By using the formula a² – b² = (a + b)(a – b)

We get,

63a²b² – 7 = 7(9a²b² – 1)

= 7{(3ab)² – (1)²}

= 7(3ab + 1)(3ab – 1)