Learn how to simplify and rationalize the denominator of a polynomial expression ex 4

The video tutorial explains how to simplify a radical expression by rationalizing the denominator. It begins with simplifying sqrt 16 and proceeds to rationalize the denominator of 2 / sqrt 10 by multiplying by sqrt 10. The process involves understanding inverse operations of squaring and square roots, leading to the final simplified expression of sqrt 10 / 5.

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