3х²+2у²=11 х=3-2у 3(3-2у)²+2у²=11 3(9-12у+4у²)+2у²=11 27-36у+12у²+2у²=11 14у²-36у+16=0 |:2 7у²-18у+8=0 D=324-224=100 y1=(18+10)/14=28/14=2 y2=(18-10)/14=8/14=4/7 x1=3-2y=3-4=-1 x2=3-2y=3-3*4/7=9/7=1цел2/7