` 1) `
` (x^2 - 2x - 1)(x - 3) `
` = x^2 (x - 3) - 2x(x - 3) - (x - 3) `
` = x^3 - 3x^2 - 2x^2 + 6x - x + 3 `
` = x^3 - 5x^2 + 5x + 3 `
` 2) `
` (2x - 1)(x^2 - 5x + 3) `
` = 2x(x^2 - 5x + 3) - (x^2 - 5x + 3) `
` = 2x^3 - 10x^2 + 6x - x^2 + 5x - 3 `
` = 2x^3 - 10x^2 - x^2 + 6x + 5x - 3 `
` = 2x^3 - 11x^2 + 11x - 3 `