Simplify x4−y4x2+y2÷(x−y)\frac{x^4-y^4}{x^2+y^2} \div (x-y)x2+y2x4−y4÷(x−y).
x+yx+yx+y
x−yx-yx−y
x2+y2x^2+y^2x2+y2
1