Okay, I think you mean GCF, (Greatest Common Factor). :P Factors are the numbers multiplied by each other to get a number. Example: Factors of 6: 1, 2, 3, 6. 1 times 6 = 6, and 2 times 3 = 6. So, now you must find the GREATEST COMMON FACTOR IN VALUE between 40 and 50. Factors of 40: 1, 2, 4, 5, 8, 10, 20, and 40. Factors of 50: 1, 2, 5, 10, 25, and 50. Which is the factor that BOTH 40 and 50 have? Well, they have a lot of the same factors, but we need to find the GREATEST ONE in value. (By value, I mean the biggest number). So it's clear that the factor 10 is the greatest common factor, soooooo..... Final Answer: GCM = 10. :-)
A) We have zeroes at (2,0) (3,0) (5,0) (9,0) and (10,0). Therefore, we can write the function as (x-2)(x-3)(x-5)(x-9)(x-10) = x⁵-29x⁴+311x³-1519x²+3360x-2700