nomartinez2020 nomartinez2020

28-11-2017
Mathematics

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When the square of a certain number is diminished by 9 times the number the result is 36. Find the number.

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jordan107 jordan107

28-11-2017

I think the number is 4

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popalabdulqayou popalabdulqayou

28-11-2017

x^2-9x=36
x^2-9x-36=0
(x-12)(x+3)=0
x=12
x=-3

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