document.write( "Question 669649: Find three consecutive odd integers such that the square of the largest integer is 25 more than three times the sum of the smaller numbers. Give your answers as comma-separated numbers in ascending order.\r
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document.write( "I have tried everything I learned to answer this question, but I just seem to keep getting stuck around here(if I did it right):X^2-6x-15=0\r
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document.write( "Please help if possible it it my last question and it is due at midnight! Thank you!!
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Algebra.Com's Answer #416518 by DrBeeee(684) ![]() You can put this solution on YOUR website! You must have had an error. The correct quadratic is \n" ); document.write( "(1) x^2 + 2*x - 15 = 0, which has roots at \n" ); document.write( "(2) x = {-5,3}, where we can get two solution \n" ); document.write( "sequences \n" ); document.write( "(3) (-5,-3,-1) and (3,5,7) \n" ); document.write( "To check use \n" ); document.write( "(4) (x+4)^2 = 25 + 3*(x + x + 2) \n" ); document.write( "Is ((-1)^2 = 25+3*(-5-3))? \n" ); document.write( "Is (1 = 25 + 3*(-8))? \n" ); document.write( "Is (1 = 25 - 24)? \n" ); document.write( "Is (1 = 1)? Yes \n" ); document.write( "Is (7^2 = 25+3*(3+5))? \n" ); document.write( "Is (49 = 25+3*8)? \n" ); document.write( "Is (49 = 49)? Yes \n" ); document.write( "Answer: There are two sequences of consecutive odd intergers that satisfy the problem statement - (-5,-3,-1) and (3,5,7). \n" ); document.write( "Let me derive (1) so you may find your error. \n" ); document.write( "Let x = the first odd integer \n" ); document.write( "Then the next odd integer is x + 2 and the third is x + 4. \n" ); document.write( "The problem statement has \n" ); document.write( "(5) (x+4)^2 = 25 + 3*(x + x+2) or \n" ); document.write( "(6) x^2 + 8*x + 16 = 25 + 3*(x + x+2) or \n" ); document.write( "(7) x^2 + 8*x + 16 = 25 + 6*x + 6 or \n" ); document.write( "(8) x^2 + 2*x - 15 = 0 which agrees with (1) \n" ); document.write( " \n" ); document.write( " |