Online Course Discussion Forum

Math Challenge II-A Wk1 HW 1.22

 
 
Picture of Areteem Professor
Re: Math Challenge II-A Wk1 HW 1.22
by Areteem Professor - Thursday, 4 June 2020, 1:12 PM
 

Note that the first three terms are all cubes: $x^3$, $(-z)^3$, and $(-2y)^3$. Take a look at the commonly used formulas listed at the beginning of the chapter in your book. Which of those involve the sum of  three cubes?