In a two-digit number, the product of the digits is 18 and the sum is 9. Find the number.

asked Nov 26, 2021 89.3k views

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Let the digits be x and y

Given that- xy= 18 and x+y=9

SO y= 18/x

And x+(18/x)=9

x^2 -9x+18=0

(x-6)(x-3)=0

So x=6,3

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