Question

Помогите решить №1423

Answer 1

$left { {{y+5=x^2} atop {x^2+y^2=25}} right. \ left { {{y+5=x^2} atop {x^2=25-y^2}} right. \ left { {{y+5=x^2} atop {x^2=(5-y)(5+y)}} right. \ left { {{y+5=x^2} atop {5+y=(5-y)(5+y)}} right. \ left { {{y+5=x^2} atop 1=5-y}} right. \ left { {{y+5=x^2} atop y=4}} right. \ left { {{4+5=x^2} atop y=4}} right. \ left { {{x^2=9} atop y=4}} right. \ left { {{x=pm3} atop y=4}} right.$



$left { {{xy=16} atop { frac{x}{y} =4}} right. \ left { {{xy=16} atop {x =4y} right. \left { {{4y*y=16} atop {x =4y} right. \ left { {{y^2=4} atop {x =4y} right\ left { {{y=pm2} atop {x =pm8} right.$




$left { {{ x^{2} +2y^2=96} atop {x=2y}} right. \ left { {{ (2y)^{2} +2y^2=96} atop {x=2y}} right. \ left { {{ 4y^{2} +2y^2=96} atop {x=2y}} right. \ left { {{ 6y^2=96} atop {x=2y}} right. \ left { {{ y^2=16} atop {x=2y}} right. \ left { {{ y=pm 4} atop {x=2y}} right. \ left { {{ y=pm 4} atop {x=pm8}} right.$

Answer 2

спасибо))))