1. Zero column
column 1 is zero.
3x3 with full column of zeros
2 visual steps / zero column shortcut
2. Stop early
det = 0.
Practice Level 8
A few quick rounds make the products familiar; the sign is the only thing to guard.
Start Level2 visual steps / zero column shortcut
column 1 is zero.
det = 0.
A few quick rounds make the products familiar; the sign is the only thing to guard.
Start Level