( ) EXAMPLE 1 Evaluating Square Roots a. 36 = 6 6 because 2 = 36 . b.

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Presentation transcript:

( ) EXAMPLE 1 Evaluating Square Roots a. 36 = 6 6 because 2 = 36 . b. = 6 6 because 2 = 36 . b. 64 – = –8 because (–8) 2 = 64 . because ( ) 2 5 c. 4 25 2 5 = 4 25 = . d. 0.81 = 0.9 because (0.9) 2 = 0.81 .

EXAMPLE 2 Standardized Test Practice SOLUTION 2 is closer to 9 or 10. You can use a number line to approximate 95 nearest whole number. Because to the is between 9 and 10, you need to decide whether Find 9.5. You can calculate that 9.5 = 90.25 and ( ) = 95.

EXAMPLE 2 Standardized Test Practice 95 As shown on the number line, is between 90.25 and 100 , so it has a value between 9.5 and 10. Therefore, is closer to 10 than it is to 9. 95 ANSWER To the nearest whole number, 10. The correct answer is C.

GUIDED PRACTICE for Examples 1 and 2 Find or approximate the square root to the nearest integer. 1. 4 ANSWER 4 = 2 2. ANSWER =

GUIDED PRACTICE for Examples 1 and 2 Find or approximate the square root to the nearest integer. 3. 36 – ANSWER = –6 36 – 4. 81 – ANSWER 81 – = –9

GUIDED PRACTICE for Examples 1 and 2 Find or approximate the square root to the nearest integer. 5. 23 ANSWER = 23 5 6. 41 ANSWER 41 = 6

GUIDED PRACTICE for Examples 1 and 2 Find or approximate the square root to the nearest integer. 7. 25 81 ANSWER = 1 25 81 8. 0.36 ANSWER 0.36 = 1