Question

1) Calcule o valor de cada expressão:
a) 9-{3-[7+2 -(8-2) + 5] - 8+4}
b) 180 + {2+ [ 12:4 + 5 x 3] - 9}
c)
$- 2 {}^{2} + 3.( \sqrt{6} + 5.6 - 2. \sqrt{81}$


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Answer 1

a)9-{3-[7+2-6+5]-8+4}=

9-{3-[14-6]-8+4}=

9-{3-[8]-8+4}=

9-{3-8-8+4}=

9-{7-16}=

9-{-9}=

9+9=18

b)180+{2+[12:4+5.3]-9}=

180+{2+[3+15]-9}=

180+{2+18-9}=

180+{20-9}=

180+11=191

c)-2^2+3(√6+5.6-2.√81)=

4+3.(√6+30-2.9)=

4+3.(√36-18)=

4+3.(6-18)=

4+3.(-12)=

4-36=-32