Question

Factor 64r^3+125

Answer 1

are you sure that the sign is positive?

Answer 2

yes

Answer 3

A3 + B3 = (A + B)(A2 - AB + B2)
(4r)^3 + 5^3 = (4r+5)[(4r)^2 - 20r + 5^2]
(4r)^3 + 5^3 = (4r+5)(16r^2-20r+25)

Answer 4

\[A^3 + B^3 = (A + B)(A^2 - AB + B^2) \]
\[(4r)^3 + 5^3 = (4r+5)[(4r)^2 - 20r + 5^2]\]
\[(4r)^3 + 5^3 = (4r+5)(16r^2-20r+25) \]