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\nRationalising The Denominator\n

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\nIn this video we discover what rationalising the denominator is and how to do it. The denominator is the bottom part of a fraction. Rationalising the denominator is when we move a root from the bottom - the denominator - to the top (the...\nIn this video we discover what rationalising the denominator is and how to do it. The denominator is the bottom part of a fraction. Rationalising the denominator is when we move a root from the bottom - the denominator - to the top (the numerator). For a surd to be in it’s simplest form, the denominator cannot be irrational. We cannot have a root in the denominator. It isn’t wrong to have a root at the bottom - it just isn’t considered the simplest form. To move a root from the denominator, we need to multiply the top and bottom both by the root. Sometimes there is more than just a root in the denominator. When this happens, we need to multiply by the WHOLE of the denominator but change the sign. So if it was root 2 plus 3 then we need to multiply both the numerator and the denominator by root 2 MINUS 3.\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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3:43
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Grade
6th - Higher Ed
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Subjects
Science
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Media Type
Instructional Videos
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Source:
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\nFuseSchool - Global Education\n\n
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Date
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2017
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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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Concepts

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work, square numbers, square roots
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Additional Tags

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maths, digital learning, online learning, learn maths, school maths, mathematics, gcse maths, high school maths, maths help, free online education, surds, square root, simplify surds, multiply surds, divide surds, evaluate surds, add surds, subtract surds, rationalise, rationalising, numerator, denominator, simplest form, click play, expanding brackets, minus ab, bottom, root, root 2, video, rationalizing, fraction, move, multiply, check, calculator, rationalize, pause, give, question, ready, cancel, expand
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Classroom Considerations

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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: Rationalising The Denominator\" href=\"/subscription/new\">\"Rationalising\n\n
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