Question

{x2-y=14
{3x+y=4
помогите решить

Answer 1

{x^2-y=14 {3x+y=4 >> y=4-3x x^2-4-3x=14 x^2-3x-4-14=0 x^2-3x-18=0 D=9+72=81 x1=3+9=12÷2=6 x2=3-9=-6÷2=-3 y1=4-3×6=-14 y2÷4-3×(-3)=13