Question

преобразуйте в многочлен (x+6)(x^2-6x+36)-2(x-3)(x+3)

Answer 1

$(x+6)( x^{2} -6x+36)-2(x-3)(x+3)= \ \ =( x^{3} +6 ^{3} )-2( x^{2} -9)= x^{3} +216-2 x^{2} +18= \ \ = x^{3} -2 x^{2} +234$

Answer 2

(x+6)(x²-6x+36)-2(x-3)(x+3)=x³-6x²+36x+6x²-36x+216-2(x²-9)=x³+216-2(x²-9)=x³+216-2x²+18=х³-2х²+234