Find the limit. [ lim _{(x, y) ightarrow(4,-4)} frac{4 x^{2}-4 y^{2}}{x+y}= ]
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First, we can simplify the expression by factoring out a 4 from the numerator: \[ \frac{4 x^{2}-4 y^{2}}{x+y} = 4 \frac{x^{2}-y^{2}}{x+y} \] Show more…
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