Odpowiedź:
zadanie 1
-3(6 + 13c - 5d) = -18 - 39c + 15d
4(3x + 8xy +4z) = 12x + 32xy + 16z
7x(-4x - 5x2 + 2) = - 28x^2 - 35x^3 + 14x
zadanie 2
2(3x - 4) + 5(8x +12) = 6x - 8 + 40x + 60 = 46x + 52
m(m - 3n) - n(7m + 3n)= m^2 -3mn - 7mn + 3n^2 = m^2 - 10mn + 3n^2
5(2x2 + 3x) - x(9 - 5x) = 10x^2 + 15x - 9x + 5x^2 = 15x^2 + 6x