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

User Nock
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x^2-9x=36
x^2-9x-36=0
(x-12)(x+3)=0
x=12
x=-3
User Pannu
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7 votes
I think the number is 4
User Chrmue
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