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what times what equals -220 ?

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mary1717 | Student, Grade 9 | eNotes Newbie

Posted February 23, 2012 at 12:12 PM via web

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what times what equals -220 ?

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted February 23, 2012 at 12:16 PM (Answer #1)

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The question you have asked is very vague, there are an infinite pairs of numbers that give -220 when they are multiplied by each other.

For example -11 and 20, -20 and 11, etc.

If you would like to know if there are two equal numbers that can be multiplied to give -220, there are none in the real number system. The complex number `i*2*sqrt 55` when multiplied with itself gives -220.

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