Y= -x^2+10x-22, 3y+2x=3, 3×(-x^2+10x-22)+2х=3, -3х^2+30х-66+2х=3, -3х^2+32х-69=0, D=32^2-4×(-3)×(-69)=196, x1=(-32-корень 196)/2×(-3)=(-32-14)/(-6)=(-46)/(-6)=7 2/3, х2=(-32+корень 196)/2×(-3)=(-32+14)/(-6)=(-18)/(-6)=3, у1=-(23/3)^2+10×23/3-22=-529/9+230/3-22=(690-529-198)/9=-37/9=-4 1/9, у2=-(3)^2+10×3-22=-9+30-22=-1