H
hai_k6


bài 1: [ tex]\sqrt{x}+[ tex]\sqrt{2+x}+[ tex]\sqrt{4+x}=[ tex]\sqrt{y-1}+[ tex]\sqrt{y-3}+[ tex]\sqrt{y-5}
x+y+[ tex] x^2+[ tex] y^2=44
bài 2:
2([ tex] x^3+2x-y-1)=[tex] x^2(y+1) [tex] y^3+4x+1+ln([tex] y^2+2x)=0[/tex]
x+y+[ tex] x^2+[ tex] y^2=44
bài 2:
2([ tex] x^3+2x-y-1)=[tex] x^2(y+1) [tex] y^3+4x+1+ln([tex] y^2+2x)=0[/tex]