Hello,
Let (x-y) be X
So you have X^2+2*7*X+7^2
you can switch the first and the second term, as the addition is commutative oO
This is the problem:
Factor: 14(x-y) + (x-y)squared + 49
If the first and second terms were switched, I could figure it out on my own, but, alas, they are not. It was written in the book this way. Could someone explain how to solve this? Thank-you.