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

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

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

4. 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?

5. Simplify each expression
Ex 5) Ex 6)

6. Ex 7) −