book Maths Puzzle Numerical Ability


hi
i want to ask that how can i find the sum of the equations like
1*+2*+......+n* where * = 2

Read Solution (Total 0)

book Other Question
Please help:

how do I factor the following polynomial using any method?

x^6 + 125

Thank you so much! please make it clear how i open the brackets best thanx
17-(13x-(15-19x)-21x)=25-((11x-23)-(18x-7))