Page 60 - Math Course 2 (Book 1)

Squares and Square Roots

Find Z 2 Find – 144
Z 2 indicates the positive square roots of Z . A. 12
2
B. –12
z may be negative, but |z| is positive,
C. –72
so = |z|. D. –20,736
2
Z
Answer
Answer |z|

Find Square Roots with a Find + 16

Calculator A. 4
B. –4
Examples C. 4 and –4
D. 256 and –256

22
Use a calculator to f nd to the nearest tenth. Answer

2nd 22 Enter 4.69041575982
Find t 2
Use a calculator
A. t

22 = 4.7 Round to the B. t
C. –t
nearest tenth.
D. t and –t
Answer 4.7 Answer

Find Square Roots
Use a calculator to f nd to the nearest Use calculator to f nd to the nearest tenth.
– 319
71
tenth.
A. 8.4
2nd 319 Enter 17.86057109949 B. 8.43
C. 35.5
Use a calculator
D. 5041
– 319 = –17.9 Round to the
nearest tenth. Answer

Answer –17.9

38
Your Turn! Use calculator to f nd – to the nearest tenth.
A. –1444
Find Square Roots B. –19
C. –6.2
Find 25 D. –6.16

A. 624
B. 12.5 Answer
C. 5
D. –5

Answer

52