Matrix Operations at glance
Use Matrix Operations to add, subtract, or multiply matrices.
3D Touch. To open a Matrix Operations from the Home screen, press MathX, then choose the Matrix Operations quick action. See Quick Actions.
Before you fill in the matrices, the first thing you'll need to do is to choose the operation. MathX supports three mathematical operations - addition, subtraction, and multiplication.
Next, tap + or - to adjust the dimensions of Matrix 1 and Matrix 2, and tap Done when you're ready to fill in the matrices.