Factor -15 X -25 using the GCF
To factor -15x - 25 using the greatest common factor (GCF), we first need to find the GCF of the two numbers: -15 and -25.
The prime factors of -15 are -1, 3, and 5.
The prime factors of -25 are -1, 5, and 5.
The common prime factors are -1 and 5. The greatest common factor is the product of these common prime factors, which is -1 * 5 = -5.
Now, we can express -15x - 25 as a product of the GCF and the remaining factors:
-15x - 25 = -5(3x + 5)
Therefore, -15x - 25 can be factored as -5(3x + 5).