Example:
4x³ - 2x² + 6x
Step-by-step explanation:
4x³ = 2 times 2 times xxx (it has 3 x's because it says x cubed)
2x² = 2 times xx (it has 2 x's because it says x squared)
6x = 2 times 3 times x
2x is the GCF as that is what they all have in common so
2x (2x² - x + 3)
I hope this example helps :)