(less than 0, no roots)
ExampleAlso, how can you determine in an answer in the format of (x + 1)(x - 2) whether it will be a +-, -+, ++, or -- answer?
If the sign after '-7x' is negative, it means the signs within the two brackets will be different.
ie. (2x + 1)(x - 4)
If the sign was positive, it means the signs will be the same for both brackets. This sign used would be the sign after the squared term.
(2x - 3)(6x - 1)