factorise-0-20-with-alpha-lines Published 30 June 2017 at 800 × 800 in How many quadratics factorise? ← Previous Next → The orange lines c = bα – α² for α = 0, 1, 2, 3 superimposed on our existing plot The orange lines c = bα – α² for α = 0, 1, 2, 3 superimposed on our existing plot Jigsaw Jigsaw is a talented chess player and fervent climber. All articles by Jigsaw More from ChalkdustThings to makePlatonic shapes from tube maps, flexagons, and more mathematical craftWhat’s hot and what’s notOptimal Pac-ManGhostbusting with graph theoryReinventing 2DWhat a difference a matrix makesYour social networksHow similar are you to your friends?Art meets maths