Presentation on theme: "11.1 and 11.2 Radicals Goal(s): 1.To find the square roots of perfect squares, perfect square radicands and estimate the roots of irrational numbers 2.Determine."— Presentation transcript:
11.1 and 11.2 Radicals Goal(s): 1.To find the square roots of perfect squares, perfect square radicands and estimate the roots of irrational numbers 2.Determine whether a number is rational or irrational 3.Determine acceptable replacements for radicands
Square Roots When we raise a number to the second power, we have “squared” the number. Sometimes we need to find the number that was squared. That process is called “finding the square root of a number”. Every positive number has both positive and negative square roots. Radical Sign “Principal” Square Root is the positive 5.
Simplify: (Answer is only the principal root) 9 -8 Negative square Root Because (9) 2 = 81 (6) 2 -36 (-6) 2 -36 Not possible
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