Question

1) De acordo com as informações do quadro calcule o valor aproximado de:

√6=2,45
√7=2,65
√11=3,32

a) √44+2√99
b) 2√24-√54
c) -√252+√28
d) -√96+√11-3√112

Answer 1

√6=2,45      √7=2,65       √11=3,32


a) √44+2√99 = √4.11 +2√9.11 ==>2√11+2.3√11
==>2√11+6√11
==>8√11 ==> 8.(3,32)
==> 26,56

b) 2√24-√54= 2.√4.6 - √9.6==>2.2√6 - 3√6
==>4√6-3√6
==> √6
==>2,45

c) -√252+√28 ==> -√2².3³.7+√2².7==> - 2.3√7+2√7
==> - 6√7+2√7 ==> -4√7
==> - 4.(2,65)==>  - 10,60

d) -√96+√11-3√112 ==> -√16.6+√11-3√16.7
==> -4√6+√11-3.4√7
==> - 4√6+√11-12√7
==> - 4(2,45)+3,32-12(2,65)
==> - 9,80+3,32-31,80
==> - 38,28