Question

11) Calcule o valor numérico das seguintes expressões:
$a) \: ( { - 5)}^{2} = \\ b) \: - {5}^{2} = \\ c) \: ) ( - {7})^{2} \: = \\ d) \: - {7}^{2} \: = \\ e) \: ( - {1})^{4} = \\ f) \: - {14}^{4} =$
​

Answer 1

Resposta:

$a)( - 5)^{2} = ( - 5) \times ( - 5) = 25$

b) - 5^2 = - (5×5) = - 25

c) (-7)^2 = (-7)×(-7) = 49

d) - 7^ 2 = - (7×7) = -49

e) (-14)^4 = (-14)×(-14)×(-14)×(-14) = 38416

f) -14^4 = - (14×14×14×14) = - 38416

Answer 2

Resposta:

A) ( - 5 ) ² = ( - 5 ) × ( - 5 ) = + 25

B - 5 ² = ( - 5 ) × ( + 5 ) = - 25

C)( - 7 ) ² = ( - 7 ) × ( - 7 ) = + 49

D) - 7 ² = ( - 7 ) × ( + 7 ) = - 49

E) ( - 14 ) ⁴ = ( - 14 ) × ( - 14 ) × ( - 14 ) × ( - 14 ) = + 38.416

F) - 14 ⁴ = ( - 14 ) × ( + 14 ) × ( + 14 ) × ( + 14 ) = - 38.416

Espero ter ajudado!❤