Proof WritingChallengeDirect Proof ShareDirect Proof · Challenge problemLet xxx and yyy be rational numbers with x≠yx \ne yx=y. Which of these is necessarily rational?Ax2+y2\sqrt{x^2 + y^2}x2+y2Bxy\sqrt{xy}xy (when xy>0xy > 0xy>0)C2x2^x2xDx2−y2x−y\dfrac{x^2 - y^2}{x - y}x−yx2−y2Check Show answer Walk through it step by step Practice more like this Review this concept