Question

Пооомогите с уравнениями пажажа!

Answer 1

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