Factor the expression given below. Write each factor as a polynomial in descending order. Enter exponetns using the caret ( ^ ).
125x^3 + 512y^3
I know the 125 is writen as
(5x)^3
beyond that i personally dont know
Cube root of first term = 5x Cube root of second term = 8x
So we have a sum of cubes which can be factored as :
(5x + 8y) [ (5x)^2 - 5x*8y + (8y)^2 ] =
(5x + 8y ) ( 25x^2 - 40xy + 64y^2)
Thank you, Sir CPhill
No prob!!!!
+279 
