Question

Efetue:
A [-7+14÷(5-√¯ 49)]÷7
B [-13+13.(-1-3.2²)]÷14
C -5-[(-5)² -(-2-√¯ 9).5]÷10

Answer 1

A
[-7+14÷(5-√49)]÷7
[-7+14÷(5-7)]÷7
[-7+14÷(-2)]÷7
[-7+(-7)]÷7
[-7-7]÷7
-14÷7

-2

B
[-13+13.(-1-3.2²)]÷14
[-13+13.(-1-3.4)]÷14
[-13+13.(-1-12)]÷14
[-13+13.(-13)]÷14
[-13+(-169)]÷14
[-13-169]÷14
-182÷14
-91/7

-13

C
-5-[(-5)²-(-2-√9).5]÷10
-5-[(-5)²-(-2-3).5]÷10
-5-[(-5)²-(-5).5]÷10
-5-[(-5)²+5.5]÷10
-5-[(-5)²+25]÷10
-5-[25+25]÷10
-5-50÷10
-55÷10
-5,5