Write a math question for the theme "Characteristics of reciprocal/rational function f(x) = 1/x," then provide an answer.Question: Find the x-intercept(s) of the reciprocal/rational function f(x) = 1/x.
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Question: Simplify the expression 4x² + 6xy - 10x - 15y using the distributive property.
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What is the area, in square units, of a square with side length 5 units?