X=4Y+3
(4Y+3)^2=21Y+28
16Y^2+24Y+9-21Y-28=0
16Y^2+3Y-19=0
D=3^2-4*16*(-19)=1225
Y1=(-3-koren1225)/2*16=-38/32=-1,1875
Y2=(-3+koren1225)/2*16=32/32=1
X1=4*(-1,1875)+3=-1,75
X2=4*1+3=7
otwet (-1,75;-1,1875) (7;1)
X=4Y+3
(4Y+3)^2=21Y+28
16Y^2+24Y+9-21Y-28=0
16Y^2+3Y-19=0
D=3^2-4*16*(-19)=1225
Y1=(-3-koren1225)/2*16=-38/32=-1,1875
Y2=(-3+koren1225)/2*16=32/32=1
X1=4*(-1,1875)+3=-1,75
X2=4*1+3=7
otwet (-1,75;-1,1875) (7;1)