The vertical sides of a square are increased by $k$ and the horizontal sides are decreased by $k$. The resulting area is 9 less than the original area. What is the number $k$ ?

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The Answer of The vertical sides of a square are increased by $k$ and the horizontal sides are decreased by $k$. The resulting area is 9 less than the original area. What is the number $k$ ?

The Vertical Sides of a Square Are Increased By kkk And the Horizontal Sides Are Decreased By

The Vertical Sides of a Square Are Increased By $k$ And the Horizontal Sides Are Decreased By