Write the expression 7x^3-28xy^2 as the product of 3 factors

7·x^3 - 28·x·y^2

= 7·x· (x^2 - 4·y^2)

= 7·x· (x + 2·y) · (x - 2·y)

7x (x - 2y) (x + 2y).

Step-by-step explanation:

First take out the GCF which is 7x:

7x^3-28xy^2

= 7x (x^2 - 4y^2)

Now factor the expression in the brackets:

= 7x (x - 2y) (x + 2y) (answer).