Find the greatest common factor of these three expressions.
42x, 18x^3, and 12x^4
ILL MARK THE BRAINLIEST

6x

42/6 = 7 (valid), 18/6 = 3 (valid), 12/6 = 2 (valid)

7, 8, 9, 10, and 11 are all not divisible by 12, and 12 is not divisible by 18, so 6 is the highest number.

Also, each number has at least one x, so you can take one out.

Remaining=
6x (7 + 3x^2 + 2x^3)

C

Step-by-step explanation:

it's the only one whose inequalities match up, because 0 > -21 > -22