College Algebra (10th Edition)

$x^2-2xy+y^2$
$(x-y)^2$ The book tells us to use the special product formulas to solve the problem. In order to do so, we must refer to these formulas: $(a + b)^2 = a^2 + 2ab + b^2$ $(a – b)^2 = a^2 – 2ab + b^2$ Now, we can rewrite our expression as: $x^2-2xy+y^2$