Factorize x2+2xy+y2-a2+2ab-b2.

Factorize $x^{2} + 2 x y + y^{2} - a^{2} + 2 a b - b^{2}$ .

Match the items on the right to the items on the left.

step 1

step 2

step 3

step 4

step 5