How do you factor 3x^5 - 21x^4 + 15x^3?
1 Answer
May 16, 2015
f(x) = 3x^3(x^2 - 7x + 5)
The trinomial in parentheses can't be factored because its Determinant D = b^2 - 4ac = 29 isn't a perfect square.
