RootsLesson 1-8

•square root – one of the given number’s two equal factors 2 is the square root of 4 because 2 = 4² 15 is the square root of 225 because 15 ²= 225•perfect square – a rational number whose square root is a whole number 196 is a perfect square because its square root is 14 81 is a perfect square because its square root is 9

Vocabulary

•radical sign – the symbol used to indicate a positive square root, √ . •cube root – one of three equal factors of a number, written as ∛ 3 is the cube root of 27 because 3 = ³27•perfect cube – a rational number whose cube root is a whole number 64 is a perfect cube because its cube root is 4 64 = 4 · 4 · 4 = 4 ³

Vocabulary

Examples

Guided Practice

Homework

p 75 #1-41 odd, 43-54 all