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Factor completely. Chapter 7 Section 1. Radical Expressions and Functions. Vocabulary. Radical expression Radical sign b is the radicand a is the root index. Principal square root. a is a nonnegative real number, the nonnegative number ‘b’ such that
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Chapter 7 Section 1 Radical Expressions and Functions
Vocabulary • Radical expression • Radical sign • b is the radicand • a is the root index
Principal square root • a is a nonnegative real number, the nonnegative number ‘b’ such that b2 = a, denoted by b = , is the principal square root of ‘a’ • - denotes the negative square root of a number.
Example • is 5 since 52 = 25 • is 10 since 102 = 100 • - is – 5 since (-5)2 = 25
Evaluate If f(x) = find 4) f(18) 5) f(2)
Find the domain 6) f(x) =
Evaluate 7) 8) Note the root index.
Evaluate 9) 10)