Multiple Choice

An operations analyst is mentoring a trainee on how to handle radical expressions in cost-estimation formulas. When reviewing the expression 4x2y4\sqrt{x} - 2\sqrt{y}, the analyst explains that these are 'unlike square roots.' To help the trainee recall the rule for why these terms cannot be combined, the analyst should compare it to which of the following algebraic expressions?

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Updated 2026-04-20

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