cost=koren' iz 1-sin v kvadrate t=3/5
(1,9+х)-2,5=1,9+х-2,5=1,9-2,5+х=-0,6+х,если х=-5,86,то -0,6+х= -0,6+(-5,86)= -6,46
(2х+7)(3х-1)-(5х-1)(х+3)=(х+1)²
Y=8x-11, y=-6x+7
8x-11=-6x+7, 14x=18, x=9/7
y=8.9/7-11=72/7-11=72/7-77/7=-5/7
P(9/7, -5/7)
x/y=9/7):(-5/7)=-9/7.7/5=-9/5