Simplify the expression: (- 8x⁴ + 3x³ + x) · (- 3x²)

To simplify the expression, distribute -3x² to each term inside the parentheses:

\( (-8x^4) \cdot (-3x^2) = 24x^{4+2} = 24x^6 \)

\( (3x^3) \cdot (-3x^2) = -9x^{3+2} = -9x^5 \)

\( x \cdot (-3x^2) = -3x^{1+2} = -3x^3 \)

Combining these terms, we get:

\( 24x^6 - 9x^5 - 3x^3 \)

Ответ: 24x⁶ - 9x⁵ - 3x³.