SOLUTION: factor 125x3 + 64y3

Question 249567: factor 125x3 + 64y3
Answer by chosenpoint(26) (Show Source): You can put this solution on YOUR website!
Equations/249567 (2009-12-14 02:59:25): factor 125x3 + 64y3

You can use the following formula to factor the sum of 2 cubes:

(a^3+b^3)=(a+b)*(a^2�a*b+b^2)

In this specific case, a=5x and b=4y

Then we can easily substitute these into our formula

simplify and final answer

As a note, the difference of two cubes can be found using the following formula:

(a^3�b^3)=(a�b)*(a^2+ab+b^2)

Answer 181746 by chosenpoint(20) on 2009-12-14 04:59:57