Learn Before
Simplifying and
Simplify two expressions in which a square root is raised to the second power, demonstrating that squaring undoes the square root.
ⓐ :
Rewrite the squared expression as a product of two identical factors:
Apply the Product Property to combine the two radicals:
The result is 2 — squaring a square root returns the original radicand.
ⓑ :
Rewrite as a product of two identical factors:
Multiplying two negative quantities gives a positive result. Combine the radicals:
The result is 11. The negative signs cancel because the product of two negatives is positive, and then . In general, for any nonnegative number , and as well, since squaring eliminates the negative sign.
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Elementary Algebra @ OpenStax
Ch.9 Roots and Radicals - Elementary Algebra @ OpenStax
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Simplifying and
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Learn After
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