Odpowiedź:
x^2 lub y^2 to znaczy x albo y do potęgi drugiej
z zadania 24 podpunktu e nie jestem pewna
Szczegółowe wyjaśnienie
Zadanie 4
a] [x+y] + [x-4] - [5-y]
x +y + x -4 -5 +y
2x +2y -9
b] - [2x + y] - [3-x] + [2y - 5]
-2x - y -3 +x + 2y -5
-1x + 1x - 8
c] [3x -y +1] - [x+y] + [ y -x]
3x - y +1 -x -y + y -x
1x -1y +1
d] - [ 2x^2 - 3xy] - [ 2y - 3x^2] + [-xy - y]
-2x^2 + 3xy - 2y + 3x^2 - xy - y
1x^2 + 2xy - 3y
Zadanie 24
a] [a +b] - [2a -b] -[a -2b]
a +b - 2a +b -a + 2b
-2a + 4b
b] [3x - y +1] - [x+y] + [ y -x]
3x - y +1 - x -y + y -x
c] - [kx + ny] - [ 3kx + 2ny] + [5kx - 3ny]
- kx - ny - 3kx - 2ny + 5kx - 3ny
1kx - 6ny
d] [2ab + a + 3] - [ 3ab - a +3]
2ab + a + 3 - 3ab +a -3
-1ab + 2a
e] [4x^2 - 3x] - [x + 0,1x^2] - [x^2 - 0,1x]
4x^2 - 3x + x - 0,1x^2 -x^2 + 0,1x
2,9x^2 - 2,9x +x
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Odpowiedź:
x^2 lub y^2 to znaczy x albo y do potęgi drugiej
z zadania 24 podpunktu e nie jestem pewna
Szczegółowe wyjaśnienie
Zadanie 4
a] [x+y] + [x-4] - [5-y]
x +y + x -4 -5 +y
2x +2y -9
b] - [2x + y] - [3-x] + [2y - 5]
-2x - y -3 +x + 2y -5
-1x + 1x - 8
c] [3x -y +1] - [x+y] + [ y -x]
3x - y +1 -x -y + y -x
1x -1y +1
d] - [ 2x^2 - 3xy] - [ 2y - 3x^2] + [-xy - y]
-2x^2 + 3xy - 2y + 3x^2 - xy - y
1x^2 + 2xy - 3y
Zadanie 24
a] [a +b] - [2a -b] -[a -2b]
a +b - 2a +b -a + 2b
-2a + 4b
b] [3x - y +1] - [x+y] + [ y -x]
3x - y +1 - x -y + y -x
1x -1y +1
c] - [kx + ny] - [ 3kx + 2ny] + [5kx - 3ny]
- kx - ny - 3kx - 2ny + 5kx - 3ny
1kx - 6ny
d] [2ab + a + 3] - [ 3ab - a +3]
2ab + a + 3 - 3ab +a -3
-1ab + 2a
e] [4x^2 - 3x] - [x + 0,1x^2] - [x^2 - 0,1x]
4x^2 - 3x + x - 0,1x^2 -x^2 + 0,1x
2,9x^2 - 2,9x +x