Question

Пооомогите с уравнениями пажажа!

Answer 1

$left { {{x-4y=1} atop {y^2-x=4}} right. left { {{x=4y+1} atop {y^2-(4y+1)=4}} right. left { {{x=4y+1} atop {y^2-4y-5=0}} right. D=16 +20=36; y=frac{4pm6}{2} \\ left { {{x=4cdot 5 +1} atop {y=5}} right. left { {{x=4cdot(-1)+1} atop {y=-1}} right\\ right.{ {{x=21 atop {y=-3}} right. left { {{x=-3} atop {y=-1}}$