Question

решить
1) (y-1)^2+ 2y-2
      y-3        3y =5
2) 2x+2              5
     x+1  + 10 =    x
3) 4z^3-z
      z-2z=0

Answer 1

(y-1)^2+ 2y-2=y^2-2y+1+2y-2=y^2-1=(y+1)(y-1)
2x+2 = 5
2x=3
x=3/2
4z^3-z=z(4z^2-z)
z-2z=0
-z=0
z=0