How should the binomial [[$ 2x + y $]] be multiplied in order to get the answer

a) [[$ 10x + 5y $]]?

Answer: The binomial [[$ 2x + y $]] must be multiplied by .

b) [[$ -8x - 4y $]]?

Answer: The binomial [[$ 2x + y $]] must be multiplied by .

c) [[$ 2x^2 + xy $]]?

Answer: The binomial [[$ 2x + y $]] must be multiplied by .

d) [[$ 2x^2y + xy^2 $]]?

Answer: The binomial [[$ 2x + y $]] must be multiplied by .