Question

у2=-7х+4
у2-13=11х+5х2

Answer 1

-7x+4-13=11x+5x²
5x²+18x+9=0
D=324-180=144
x1= (-18+12)/10= -3/5
x2= (-18-12)/10= -3

y²1=-7*-3/5+4=21/5+4=21/5+20/5= 41/5
y1=√41/5
y1=-√41/5
y²2=-7*-3+4=25
y2=5
y2=-5
Ответ: (-3/5; √41/5); (-3/5; -√41/5); (-3; 5); (-3; -5)