Question

wyrażenia algebraiczne

a)oblicz wartośćwyrażenia 6x+1:

dlax=4

dlax=-1

dlax=-5

b)oblicz wartość8-x:

dlax=10

dlax=-1

dlax=1/2

c) x(7-x

dlax=3

dlax-5

dlax=-2

d) x2(x do potęgi2) -4x

dlax=1

dlax=5

dlax=-3

Answer 1

a) 6x +1

6*4 + 1 = 25

 

6x + 1

6*-1+1 = -6 + 1 = -5

 

6x + 1

6*-5 + 1 = -30 + 1 = -29

 

b) 8-x

8- 10 = - 2

 

8-x

8 -(-1) = 8 + 1 = 9

 

8-x

8 - 1/2 = 7 i 1/2

 

c) x(7-x)

3(7 - 3) = 21 - 9 = 12

 

x(7-x)

5(7 - 5) = 35 - 25 = 10

 

x(7-x)

-2(7-(-2) = -14 + -4 = -20

 

d) x (do pot. 2) 2-4x

1do pot. 2 * 2 - (4*1) = 1*2 - 4 = 2 - 4 = -2

 

x (do pot. 2) 2-4x

5 do pot. 2 2 - 4*5 = 25 * 2 - 4*5 = 50 - 20 = 30

 

x (do pot. 2) 2-4x

(-3) do pot. 2 2 - 4(-3) = 9*2 -(-12) = 18 + 12 = 30