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Posted by on Monday, April 23, 2007 at 3:14am.

please help me to perform the indicated operation.15-20/(3)(5)-15




You need additional parentheses or brackets to clarify the order of operations.
For example,
15-{20/[(3)(5)]}-15 = 20/15 = 4/3
(15-20}/[(3)(5])-15 = -15 1/3
15-[20/(3)](5)-15 = 100/3
(15-20)/[(3)(5)-15] = -infinity

  • math - , Wednesday, April 13, 2011 at 9:54pm

    im srry for u try some 1 like a NERD

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