SOLUTION: The product of two numbers is 18 and their sum is 9. Find the numbers.

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Question 885325: The product of two numbers is 18 and their sum is 9. Find the numbers.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let the numbers be x & y
x*y =18
x+y=9
y=9-x
x*y =18
substitute y
x*(9-x)=18
9x-x^2=18
x^2-9x-18=0
factorise
x^2-6x-3x+18=0
x(x-6)-3(x-6)=0
(x-6)(x-3)=0
x=6 OR 3
if x=6 then y =3
If x=3 then y =6