06-03-2016
Mathematics

contestada

find two consecutive whole numbers whose product is 72.

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konrad509 konrad509

06-03-2016

[tex]n(n+1)=72\\ n^2+n-72=0\\ n^2+9n-8n-72=0\\ n(n+9)-8(n+9)=0\\ (n-8)(n+9)=0\\ n=8 \vee n=-9\\\\ n+1=9 \vee n+1=-8 [/tex]

8 and 9 or -9 and -8

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