# What is #125x^9+64y^12# written as a sum of cubes?

##### 1 Answer

Dec 19, 2017

**( #5x^3# + #4y^4#)(#25x^6# - #20x^3##y^4# + #16y^8#)**

#### Explanation:

The skeletal equation for the sum of cubes:

In the expression ** #125x^9# + #64y^12#**,

**a**=

**and**#5x^3#

**b**=

#4y^4#

Now, plug in the **a** and **b** values into the skeletal equation:

** #125x^9# + #64y^12#** =

**(**#5x^3# + #4y^4# )(#25x^6# - #20x^3# #y^4# + #16y^8# )