Amsco Integrated Algebra I: Radicals and the Rational Numbers
 This is a free lesson from our course in Amsco's Integrated Algebra

 This lesson explains on the radicals,roots and rational numbers. The symbol √ is called radical sign and the quantity under the radical sign is called a radicand. A radical, which in any term containing both a radical sign and radicand, is called the root of a quantity. Some generalizations about all radicals that are square roots, whether they are rational or irrational numbers are: • for every non negative real number n:(√n)2=n and √n2=n. • every positive number has two square roots:one root is positive number called principle square root, and the other root is negative number.These two roots have same absolute values. • the square root of a negative number doesnot exist in the set of real numbers. The video below explains in detail with the help of several examples.
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