SOLUTION: If twice the square of a positive number is added to the product of -1 and the number,the result is 45.Find the number.

SOLUTION: If twice the square of a positive number is added to the product of -1 and the number,the result is 45.Find the number.

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Question 58161: If twice the square of a positive number is added to the product of -1 and the number,the result is 45.Find the number.
Answer by faceoff57(108) (Show Source): You can put this solution on YOUR website!
2x^2+-1x=45
2x^2-x-45=0
(2x+9)(x-5)=0
2x+9=0
2x=-9
x=-9/2
OR x-5=0 x=5
THE NUMBER IS 5
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