SOLUTION: find two consecutive negative integers who product is 90

SOLUTION: find two consecutive negative integers who product is 90

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Question 279122: find two consecutive negative integers who product is 90
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
let the number be x
the other number will be x-1
x(x-1)=90
x^2-x-90=0
x^2-10x+9x-90=0
x(x-10)+9(x-10)=0
(x-10)(x+9)=0
x=-9, the other number is -10

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