Question

Dane sa wyrazenia : S = 2x - (x +1),

T = 4(x+2) - x,

U= -14 -3 (x-2)

W= 3x (2x+1)

WSKAZ PRAWODLOWA ROWNOSC. :

1. T+U=O

2. S+U=O

3. U+W=O

4.W+S=O

Answer 1

T+U=4(x+2)-x, U=-14-3x+6

T+U=4(x+2)-x-14-3x+6=4x+8-x-14-3x+6=0

Odp.1

Answer 2

1. T + U = 0

4(x+2) - x +(-14) - 3(x-2) = 4x + 8 - x - 14 - 3x + 6 = (4x - x - 3x)+(8 - 14 + 6) =

= (3x - 3x) + (-6 + 6) = 0 + 0 = 0

2. S + U = 0

2x -(x +1) +(-14) - 3(x - 2) = 2x - x -1 +14 - 3x + 6 = (2x - x - 3x)+(-1 + 14 + 6) =

= (x - 3x)+(13 + 6) = -2x + 19

3. U + W = 0

-14 - 3(x - 2) + 3x(2x + 1) = -14 - 3x + 6 - 6x - 3x = (-14 + 6) + (-3x - 6x - 3x) =

= -8 + (-9x - 3x) = -8 + 12x

4. W + S = 0

3x(2x + 1) + 2x -(x + 1) = 6x + 3x + 2x - x - 1 = (6x + 3x + 2x - x) + (-1) =

= (9x + x) + (-1) = 10x + 1

 

Odpowiedź 1.