Matrix Addition, Subtraction, and Scalar Multiplication

Matrices are added/subtracted element-by-element (same dimensions required). Scalar multiplication multiplies every entry by the scalar.

PrecalculusCommon Core HSN-VM.C.7N-VMVerified correct ✓

Worked examples

Compute 3A where A = [[1, -4], [5, 4]]. What is the bottom-right entry of 3A?
Answer: 12

Subtract: A − B where A = [[-4, 4], [4, -5]] and B = [[-1, 0], [-2, -3]]. What is the bottom-right entry of A − B?
Answer: -2

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