How do you find the determinant of a2-by-2matrix? For a2×2matrix, its determinant is found by subtracting the products of its diagonals, which is a fancy way of saying in words what the following says in pictures: the matrixAwith variables: ...
While these number properties will start to become relevant in matrix algebra and calculus — and become amazingly important in advanced math, a couple years after calculus — they may seem fairly useless to you right now. That's okay; view this topic as easy points on the next test.)Why ...