1.) x^2-2x+1=36

x^2-2x-35=0

D=4+140=144

x1=2+12/2=7

x2=2-12/2=-5

4.) y^2-2/9y+1/81=4/81

y^2-2/9y -3/81=0

3/81=1/27

y^2-2/9y -1/27=0

Привести к общему знаменателю

27y^2-6y-1=0

D=36+108=144

y1=6+12/54=9/27=3/9=1/3

y2=6-12/54=-3/27=-1/9

2.(y+5)^2=4

y+5=+/-2

y+5=2          y+5=-2

y1=-3             y2=-7

3. x^2+14x+49=5

x^2+14x+44=0

D=196-176=20

x1=-14+2√5/2=-7+√5

x2=-14-2√5/2=-7-√5