Kaltlin bought some books for $6 each and received a discount of $8 off of her total purchase. she spent $58 after the discount. how many books did she buy?

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square