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\nRationalize the Denominator HS.N-RN.A.2\n

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\nIn this math video lesson, students learn how to rationalize a denominator when a radical expression appears in the denominator of a fraction and rewrite the expression in simplest form. The modeled example begins by reinforcing the idea...\nIn this math video lesson, students learn how to rationalize a denominator when a radical expression appears in the denominator of a fraction and rewrite the expression in simplest form. The modeled example begins by reinforcing the idea that a fraction with a radical in the denominator is not considered simplified. We then demonstrate the key strategy: multiplying the numerator and denominator by the same value—specifically, the radical expression in the denominator—to eliminate the radical sign. Students watch as the radical in the denominator is cleared, the radical in the numerator is simplified, and the entire fraction is reduced step by step. This clear, visual, and procedural approach helps students understand both the “how” and the “why” behind rationalizing denominators, and directly aligns to Common Core Standard HS.N-RN.A.2.\n
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Resource Details

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Curator Rating
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Educator Rating
Not yet Rated
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Media Length
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2:46
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Grade
9th - 12th
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Subjects
Math
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Media Type
Instructional Videos
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Source:
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\nThe Magic Of Math\n\n
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Date
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2026
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Language
English
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Audiences
For Teacher Use
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Usage Permissions
Fine Print: Educational Use
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Additional Tags

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rationalize the denominator hs.n-rn.a.2, perfect square, simplest form, square root, cubed, irrational, radical, rationalize, denominator, simplify, multiply, numerator, divided, ahead, radican, sqrt
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Best For: Explaining a topic
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\n\" data-title=\"Get Full Access\" data-container=\"body\" rel=\"popover\" tabindex=\"0\" aria-label=\"Play video: Rationalize the Denominator HS.N-RN.A.2\" href=\"/subscription/new\">\"Rationalize\n\n
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