Odpowiedź :
[tex] 2s(t+2s) + 2t(4t-3s) = 2st + 4s^2 + 8t^2 - 6st = -4st^2 + 4s^2 + 8t^2 [/tex]
2s(t+2s) + 2t(4t-3s) =
2s(2s + t) + 2t(-3s +4t) =
4s ² +2st - 6st + 8t ² =
4s ² + 2st - 6st + 8t ² =
4s ² - 4st + 8t ²
=D
[tex] 2s(t+2s) + 2t(4t-3s) = 2st + 4s^2 + 8t^2 - 6st = -4st^2 + 4s^2 + 8t^2 [/tex]
2s(t+2s) + 2t(4t-3s) =
2s(2s + t) + 2t(-3s +4t) =
4s ² +2st - 6st + 8t ² =
4s ² + 2st - 6st + 8t ² =
4s ² - 4st + 8t ²
=D