Question

A refrigerator has a volume given by the trinomial y^3 + y^2 – 56y. What are the possible dimensions of the refrigerator? Use factoring.

Answer 1

y, y + 8, and y – 7
y, y – 8, and y + 7
y + 7, y + 7, and y – 7
y + 8, –y + 8, and –y + 7

Answer 2

y^3 + y^2 – 56y = y(y+8)(y-7)

y, y + 8, and y – 7