Представь в виде многочлена

a) (m+n)(-m+n) = -m^2+mn+n^2 = -m^2+n^2 б) (-a-2b)(a-2b) = -a^2+2ab+4b^2 = -a^2+4b^2 в) (-3xy+8)(3xy-8) = -9x^2y^2+48xy-64 г) (t^3-5s)(5s-t^3) = -25s^2+10st^3-t^6

а) (m + n)(-m + n) = -m^2 + mn - mn + n^2 = -m^2 + n^2 б) (-a - 2b)(a - 2b) = -a^2 + 2ab - 2ab + 4b^2 = -a^2 + 4b^2 в) -9x^2y^2 + 24xy - 24xy - 64 = 9x^2y^2 - 64  г) 5st^3 - t^6 - 25s^2 + 5st^3 = 10st^3 - t^6 - 25s^2