Which product should tomas choose?
tomas learned that the product of the polynomials (a + b)
(a? - ab + b) was a special pattern that would result in a
sum of cubes, a3 + b3. his teacher put four products on the
board and asked the class to identify which product would
result in a sum of cubes if a = 2x and b = y.
(2x+y)(2x + 2xy -
(2x + y)(4x2 + 2xy - y2)
(2x + y)(4x2 - 2xy + y2)
(2x + y)(2x2 - 2xy + y2)