Question

calcula el valor de cada expresión, si x = -2​

Answer 1

Respuesta:

a) - 5

b) 4

c) 4

d) 4

e) 3

f) -6

Explicación paso a paso:

x = -2

a)

x - 3

-2 - 3

-5

b)

2 - x

2 - (-2)

2 + 2

4

c)

(x + 1)(x - 2)

(-2 + 1)(-2 - 2)

-1 . -4

4

d)

8 - x²

8 - (-2)²

8 - 4

4

e)

- (1 - x²)

- (1 - (-2)²)

- (1 - 4)

- (-3)

3

f)

2x - 1/2 x²

2(-2) - 1/2 (-2)²

-4 - 1/2 . 4

-4 - 2

-6

Answer 2

Respuesta:

x = -2

a) x - 3 = (-2) - 3= -5

b) 2 - x = 2 - (-2)= 2 + 2 = 4

c) (x + 1)(x - 2) = (-2 + 1)(-2 - 2) = (-1 ) (-4) = 4

d) 8 - x² = 8 - (-2)² = 8 - 4 =4

e) - (1 - x²) = - (1 - (-2)²) = - (1 - 4) = - (-3) = 3

f) 2x - 1/2 x² = 2(-2) - 1/2 (-2)² = -4 - 1/2 . 4 = -4 - 2 = -6