Odpowiedź:
zad. 1
[tex] - 4(2 \times ( - 2) + 5) = - 4( - 4 + 5) = - 4 \times 1 = - 4[/tex]
C.
zad. 2
odp. B
zad. 3
[tex]ob = 4 + x + 8 + y + 3 + 2y + 15 + 6x + x + y + 6 = 8x + 4y + 36[/tex]
B.
zad. 4
[tex]1. \: \: 2x \times 3y = 6xy \\ 2. \: \: (2 + x) \times 3y = 6y + 3xy \\ 3. \: \: 2x \times (3 + y) = 6x + 2xy \\ 4. \: \: 3x \times 2y = 6xy[/tex]
odp. A
zad. 5
[tex] {x}^{2} + {y}^{2} - ( {x}^{2} - {y}^{2} ) = {x}^{2} + {y}^{2} - {x}^{2} + {y}^{2} = 2 {y}^{2} [/tex]
odp. B
zad. 6
[tex]1.6a {b}^{3} \times ( - 2.5) \times {a}^{2} {b}^{3} = 4 {a}^{3} {b}^{6} [/tex]
