Solve the equation by using the quadratic formula. 
Definitions:
Accounts Receivable
Accounts receivable represents the money owed to a company for goods or services delivered or used but not yet paid for by customers.
Discounted Payback Period
The time it takes for an investment to generate cash flows sufficient to recover the initial cost, adjusted for the time value of money.
Straight-line Depreciation
A method of calculating the depreciation of an asset which assumes the asset will lose an equal amount of value each year over its useful life.
Salvage Value
The estimated resale value of an asset after its useful life has ended.
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