# How do you factor #r^3-8#?

##### 2 Answers

May 21, 2018

#### Explanation:

Difference of Cubes follows the formula:

May 21, 2018

#### Explanation:

#"this is a "color(blue)"difference of cubes"#

#"which factors in general as"#

#â€¢color(white)(x)a^3-b^3=(a-b)(a^2+ab+b^2)#

#"here "a=r" and "b=2#

#rArrr^3-8=(r-2)(r^2+2r+4)#