Determinants of Matrices (Edexcel A-Level Further Mathematics): Flashcards

A special value calculated from a square matrix

$\text{det}(A)$ or $|A|$

$ad - bc$

$a(ei-fh) - b(di-fg) + c(dh-eg)$

Matrix with determinant equal to 0

Does not have an inverse

If and only if its determinant is non-zero

Always 1

Changes the sign of the determinant

Multiplies the determinant by that scalar