Question

If A = `[(5, -2),(7, -0)]` and B = `[(8),(3)]`, then which of the following is not possible?

Options

• A²

• AB

• BA

• 15A

Answer 1

BA

Explanation:

Given A is a matrix of order 2 × 2

And B is a matrix of order 2 × 1

Since the number of columns in B = 1 ≠ 2

= Number of rows in A

∴ BA does not exists.