Factor completely. 20x^4 + 8x^3 + 40x^2

Step-by-step explanation:

Factor out the GCF of each term.  It looks like as far as the coefficients go, you can factor out a 4 from each, but nothing greater than a 4.  As far as the x-terms go, you can factor out x-squared from each, but nothing greater than that.  Factoring out 4 x-squared:

 which is the last choice there.  You cannot factor the quadratic over the real number solutions, because there are none.  They are both imaginary.  So you're done!

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.