Question

Zapisz w jak najprostrzej postaci: a) (5k+n)(k-2)-k(4k+n)= b) (4y+3)(y-2)-2y(4-2y) c) -(3c-2)(c-1)-c(c-2) d) 2(3a do potęgi 2 -1)-(a+2)(a+2) e)5x do potęgi 2(x do potęgi 2 +1)-(x do potęgi 2 -2)(x do potęgi 2 +3)

Answer 1

a) = (5k^{2} - 10k + nk - 2n) - 4k^{2} - nk = k^{2} - 10k - 2n

b) = 4y^{2} - 8y + 3y - 6 - 8y + 4y^{2} = 8y^{2} - 13y - 6

c) = -( 3c^{2} - 3c - 2c + 2) - c^{2} +2c =  -3c^{2} + 3c + 2c - 2 - c^{2} +2c = -4c^{2} + 7c - 2