1.

95^3 = __________ (calculate without direct calculation).(a) 856395(b) 857625(c) 857375(d) 852395I have been asked this question during an interview.My query is from Factorisation of Polynomials and Algebraic Identities topic in portion Polynomials of Mathematics – Class 9

Answer»

The CORRECT option is (c) 857375

Easy explanation: We know that (x-y)^3 = x^3– y^3 – 3 xy (x-y).

95^3can ALSO be written as (100-5)^3

Therefore, 95^3= (100-5)^3 = (100)^3 – (5)^3 – 3(100)(5)(100-5)

= 1000000125 – 1500(95)

= 1000000 – 125 – 142500

= 857375.



Discussion

No Comment Found

Related InterviewSolutions