Shinna wants to factor 9x2y4 – z6. “Wait!” she says. “I think I can see a way to use the difference of squares factoring pattern!” Homework Help ✎
Is Shinna’s expression a difference of squares? If so, what are the “squares”? If not, explain why.
Help Shinna factor the expression 9x2y4 – z6.
Yes; it is the difference of the square (3xy2)2 and the square (z3)2.
Remember that one factor contains addition and the other subtraction.