Question

calcule o valor de:
$3 { \times }^{3} - 2 { \times }^{2} - \times + 5 \: para \: \times = - 1$

$( - 1) {}^{8} - 3.( - 1) {}^{5} + ( - 1) {}^{16}$
${2}^{6} - {2}^{5} + {2}^{4} - {2}^{3} + {2}^{2} - {2}^{1} + {2}^{0}$

Answer 1

(-1)^8 = 1 
 -3(-1)^5 = -3(-1) = 3 
(-1)^16 = 1
Resposta: 1 + 3 + 1 = 5

2^6= 2x2x2x2x2x2 = 64
-2^5 = 2x2x2x2x2= -32
2^4= 16
-2^3= -8
2^2= 4
-2^1= -2
2^0 =1
Resposta : 64 -32 +16 - 8 + 4 - 2 +1 = 43
 

Answer 2

Boa tarde

3x^3 - 2x^2 - x + 5 
x = -1
-3 - 2 + 1 + 5 = 1

(-1)^8 - 3*(-1)^5 + (-1)^16 = 1 + 3 + 1 = 5

2^6 - 2^5 + 2^4 - 2^3 + 2^2 - 2^1 + 2^0 =
64 - 32 + 16 - 8 + 4 - 2 + 1 =
32 + 8 + 2 + 1 = 43