What is the greatest common factor of d2 - d plus 42?

Answer 1

44

Answer 2

The Greatest Common Factor (GCF) refers to a factor that is COMMON to two or more numbers. A single number cannot have a greatest common factor.

In fact, the above expression has no real factors. And if you were studying mathematics at a level where you knew about complex factors, you would know that the GCF for a single expression or number makes no sense.

Answer 3

If that was d^2 - d - 42, it would factor into (d + 6)(d - 7)

As it is, the roots are imaginary. Either way, you need at least two terms to find a GCF.