Hello i don't know how to do this problem ... plesae help me out ... thanks determine the smallest positive integers, n , which satisfies the equation n^{3} + 2n^{2} = b where b is the square of an odd integer i thoguht about replacing b by x^{2} , and move the x^{2} to the left side, then i'm kinda stuck ... please show me ... thank you very much ! david Hi David,If you replace b by x^{2} then you can write the equation as From this equation you can see that n + 2 is a square and hence n must be 2 less than a square. Cheers,Harley
