Question

a)√16+√9 e √16+9
b)√225-√81 e √225-81
c)√121√9 e √121.√9
d)√324:√81 e √ 324:√81
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Answer 1

A)√16+√9 = 4+3 ==> 7     e  √16+9= √25 = 5

b)√225-√81 = 15-9 = 6     e   √225-81 = √144 = 12

c)√121√9 = 11.3 = 33    e   √121.√9 = 11.3 = 33

d)√324:√81 =  18:9 = 2       e   √ 324:√81 = 18: 9 = 2

Answer 2

a) √16+ √9 - √25 = √4² + √3² - √5² 

= 4 + 3 - 5 

= 2

b)√225 - √81 →  √225=15 e √81 =9
Logo: √225 - √81= 15 - 9= 6



c)11 + 3 - 33 = -19




d)18 + 9
18- 9 = 36