x^3 -7x^2 +63-3/(x-3)=9x+3/(3-x)

x³-7x²+63-9x=-3/(3-x)+3/(3-x)x³-7x²+63-9x=0,x≠3x²(x-3)-4x(x-3)-21(x-3)=0(x-3)(x²-4x-21)=0x²-4x-21=0x1+x2=4 U x1*x2=-21x1=-3 U x2=7Ответ x=-3,x=7