SOLUTION: two consecutive positive integers whose product is 80.

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Question 286367: two consecutive positive integers whose product is 80.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
Let x & x+1 be the 2 positive integers.
x(x+1)=90
x^2+x-90=0
(x+10)(x-9)=0
x-9=0
x=9 ans.
9+1=10 ans.
Proof:
9*10=90
90=90