5x^2+25x-111=-x^2-8x+9 срочно прошу вас

5x^2+25x-111=-x^2-8x+95x^2+25x-111+x^2+8x-9=06x^2+33x-120=02x^2+11x-40=0D=121+4*2*40=441=21^2x1=-11-21/4=-8x2=-11+21/4=5/2