3/20/09 Have out: pencil, GP NB Bell Work Complete as many of the squares on the worksheet as you can. Part 1 only

add to your notes... Square roots: Complete PART 2 on the worksheet a square root is the inverse of a square. once you use the square root it “disappears” Complete PART 2 on the worksheet

add to your notes Simplifying Square Roots Note: whenever you are asked for an exact answer or simplified answer this is what you do Find a perfect square that divides into the number (use the chart) Rewrite the square root as a product Square root what you can Repeat as necessary Divides by 9 (This is read 3 root 5)

Example 1: Write each of the following square roots in simplest form.

another way Example 2: 18 2 9 3 3 12 3 4 2 2 A) Make a factor tree. Identify and circle the pairs. 2 9 Cross out the pairs when you take their square root. 3 3 Leave non-paired numbers under the radical sign. B) 12 3 4 2 2

Simplify the following Is there a faster way? 80 Find the largest perfect square! C) 10 8 80 5 2 2 4 16 5 2 2 Example 3: Simplify the following A) B) C) D)

Example 4: Simplify

Part 3: Simplifying with variables: = _____ We will complete part 3 now. = _____ = _____ = _____ = _____ = _____ = _____ = _____ = _____= _____ = _____ = _____ = _____= _____

Example 5: Simplify

Example 6: Part 4: b) c) a)

Work on Radicals Part 1 WS