book Maths Puzzle Numerical Ability

Please help:

how do I factor the following polynomial using any method?

x^6 + 125

Thank you so much!

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book Other Question

jo has 37 coins(all nickels, dimes, and quarters) worth $5.50 she has 4 more quarters than nickels how many dimes does jo have
hi
i want to ask that how can i find the sum of the equations like
1*+2*+......+n* where * = 2