решите системы уравнений
[tex] \left \{ {{( \sqrt{x} -3)(y-6)=0} \atop { \sqrt{x} +5y=8}} ight. [/tex]
[tex] \left \{ {{ \sqrt{4 x^{2} +7y+2}=4 } \atop { \sqrt{3 x^{2} +7y+2}=4 }} ight. [/tex]
[tex] \left \{ {{ \sqrt{x+y}=8 } \atop { \ \frac{ \sqrt{x+y} }{x}=4 }} ight. [/tex]

1)((8-5y)-3)(y-6)=0-5y^2 + 35y-30=0D=25^2y=6; y=1x=9; x=4843)√(x+y) = 8    √(x+y) / x =48/x=4x=2√(2+y) = 82+y=64y=622)√(4x^2 + 7y +2) =4   √( 3x^2 +7y +2) =4x^2 =0x=0√(4x^2 +7y+2) = 4√(7y+2) = 47y+2=167y=14y=2