How to factor a hard 4th degree polynomial (no rational zero, can't do it by grouping)

How to factor quartic polynomials with the double-cross factoring method. Check out this video for more quartic factoring techniques: https://youtu.be/lWymNeIjA20 #quarticequations #factoring #mathematics #doublecrossmethod #problem-solving Get a 2.718 shirt: https://blackpenredpen.creator-spring.com/listing/the-2-718-t-shirt?product=2 Use "WELCOME10" for 10% off Shop my math t-shirts & hoodies on Amazon: 👉 https://amzn.to/3qBeuw6 My blue jacket: 👉 https://amzn.to/3qBeuw6 ----------------------------- I help students master the basics of math. You can show your support and help me create even better content by becoming a patron on Patreon 👉 https://www.patreon.com/blackpenredpen. Every bit of support means the world to me and motivates me to keep bringing you the best math lessons out there! Thank you! ----------------------------- #math #algebra #mathbasics