Multiply 4x (-3x - 5)

Using the distributive property the product is - 12x-20. To distribute you take the numbers and or variables outside of the paranthesis and multiply it by each one in the parenthesis such that 4x is multiplied by - 3x getting - 12x and multiplying 4x by - 5 and the product is - 20x and all together the answer is - 12x-20

To solve this you distribute. Si multiply 4x and - 3x to get - 12x^2. Then multiply 4x and - 5 to get - 20x. Put those to answers together to get your final answer which is - 12x^2-20x.