Giải các hệ phương trình sau (có thể dùng phương pháp đưa về tích số)
1,{y2+x√2(y2+3)x=3(4x−1)3√y2−7x+27+√12−x=2(8x−y2)
2,{17(x−y)=3xy−2x2−y2√x+3+√10−y=x2−7y+11
3,{2(y+1x3+xy)+y2+2y+7x=(3x2−2)2√x−1+3x√−4−y=x2y+72
5,{x+y+6=2√(2y−x)(x+4)2(x√5x−y+3−5)=12(y−x)x3+4−√y−4
6,{x3−3y3=x2y+5xy22(√3x+√2y−1)−7=11y+6√y(x−y−1)
8,{5(3−√5x+y)=2x−3yx√2x3−29+3√x2+2x−9+y=91−y−10xx+2}
9,{x2+2x2y−3xy2+x(y+1)=2y2(5y+1)+2y(x2+17y+12)2=4(x+y+7)(x2+3x+8y+5)
10,{2x3+(5+y)x2+y2(2x+5)+2y(5x+2)=−y3−2xx2+y2+2x+5y+2=0
11,{2√x2+5x−y+2−2=√y2+8x+x2y−√x+3=x+11