1)(2х-3)^2=11х-19
4x^2-12x+9=11x-19
4x^2-23x+28=0
D=(-23)^2-4*4*28=81
x1=(-(-23)+9)/2*4=32/8=4
x2=(-(-23)-9)/2*4=14/8=1.75
2)(x+1)^2=7918-2x
x^2+2x+1=7918-2x
x^2+4x-7917=0
D=4^2-4*1*(-7917)=31684
x1=-4+178/2=87
x2=-4-178/2=-91
3)(x+2)^2=3131-2x
x^2+4x+4=3131-2x
x^2+6x-3127=0
D=6^2-4*1*(-3127)=12544
x1=(-6)+112/2=53
x2=(-6)-112/2=-59