Factoring Cubic Trinomials

Special technique to factor cubic expressions when they are trinomials.

[guptacharandash]

Beautiful explanation. Thanks for your noble effort.

[Practicalinvestments]

I know I’m 3 years late but can you do one like 3x^3+2x-5 this weekend ? My class won’t show for some reason and I cannot figure out how they are factoring that

[Fredscorpion]

Please, on the equation

2x³-7x+2, how do u guess that 7x= -8x+x? It has infinit possibilities, but why -8x+x???? Answer me, please, how can i guess this numbers?

[kokokoko]

you skip explanations bruh you're kinda bad at teaching

[Fredscorpion]

Help me pls, i dont understand, how can i guess the numbers? Im brazilian, i cant understand... Please, answer me, how i can i guess the numbers, how do you guess the numbers to change on equation?

[notserpeven]

You didn’t explain where you got the -2x from.

[gimimini]

how do you get the root in the 2nd example?