Question

simply:

(x²-y²+2xy+1) — (x²+y²+4xy-5)​

Answer 1

Answer: $-2y^2-2xy+6$

Step-by-step explanation:

⇒ $x^2-y^2+2xy+1-x^2-y^2-4xy+5$

⇒ $-2y^2-2xy+6$

that`s all ;-)