factor-21n^5-14n^4+7n^2
Let's factorize in ℝ: -21n5 -14n4 + 7n2
You can factorize this expression into: n2·(-21n3 -14n2 + 7)
Let's factorize in ℝ: (-21n3 -14n2 + 7)
You can factorize this expression into: 7·(-3n3 -2n2 + 1)
Factor identified: (-3n3 -2n2 + 1)
▶Factored expression:   7n2·(-3n3 -2n2 + 1)