the first step to solving this is to multiply each term in the first parenthesis by each term in the second parenthesis. this process is known as the FOIL method.
x² × 4x - 3x² + 6 × 4x - 6 × 3
calculate the product from the first two numbers
4x³ - 3x² + 6 × 4x - 6 × 3
calculate the product from the next set of numbers
4x³ - 3x² + 24x - 6 × 3
finally,, multiply the final set of numbers
4x³ - 3x² + 24x - 18
since you cannot combine these numbers together anymore,, the correct answer to your question is 4x³ - 3x² + 24x - 18
let me know if you have any further questions
:)