Question

Transform `[(1, 2, 4),(3, -1, 5),(2, 4, 6)]` into an upper triangular matrix by using suitable row transformations

Answer 1

Let A = `[(1, 2, 4),(3, -1, 5),(2, 4, 6)]`

Applying R₂ → R₂ – 3R₁ and R₃ → R₃ – 2R₁, we get

`[(1, 2, 4),(0, -7, -7),(0, 0, -2)]`

This is required upper triangular matrix.