Subject: Mathematics
Book: Maths Mastery
Matrix addition and subtraction require identical dimensions. You add or subtract corresponding elements: if A=[[a₁, a₂],[a₃, a₄]] and B=[[b₁, b₂],[b₃, b₄]], then A+B=[[a₁+b₁, a₂+b₂],[a₃+b₃, a₄+b₄]]. For instance, [[1,2],[3,4]]+[[2,0],[–1,5]]= [[3,2],[2,9]]. These operations appear in transformations, image processing, or combining data sets. Mastering matrix addition/subtraction is a stepping stone to advanced matrix operations (multiplication, inverses) that power linear algebra in engineering, physics, and computer science.
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