Lesson 3-5 Squares and Square Roots

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Presentation transcript:

Lesson 3-5 Squares and Square Roots Obj: I can find square roots. HWK: p 114 14-45 all Vocab: 1) square root 2) principal square root 3) perfect square root

Every positive number has two square roots – one positive and one negative. Use the symbol ± to indicate both. 16 = 4 - 16 = - 4 so ± 16 = ± 4

Find two square roots of each number Ex 1) 1 Ex 2) 81 Ex 3) 144

Ex 4) The square computer icon contains 676 pixels Ex 4) The square computer icon contains 676 pixels. How many pixels tall is the icon?

Simplify each expression Ex 5) 3 25 + 4 Ex 6) 16 4 + 1 2

Ex 7) 7 5 −4 + 8 9+16