The Arithmetic of Matrices (9.5.2)

Question 1

• To add or subtract matrices, they must have the same dimension, or shape. That means they must have the same number of columns and rows.

Answer 1

• To add or subtract matrices, they must have the same dimension, or shape. That means they must have the same number of columns and rows.

Question 2

• Remember to use signs properly, especially when subtracting. The most common mistakes when using matrices occur when signs are incorrect.

Answer 2

• Remember to use signs properly, especially when subtracting. The most common mistakes when using matrices occur when signs are incorrect.