У=√х+1: 1; 1/2+1=3/2; 2; 3/2 + 1=5/2; 3; 5/2+1=7/2; 4; 5; 11/2;
у=√х-1: -1; -1/2; 0; 1/2; 1; 3/2; 2; 3; 7/2.
a^2 - b^2 = (a - b)(a + b)
(x+a)^2-(y+b)^2=(x+y+1)*(x-y-5)
(x+a)^2-(y+b)^2 = (x + a + y + b)*(x + a - y - b) = (x+y + a+b)(x-y+a-b)
сравнивая с (x+y+1)*(x-y-5)
a+b= 1
a-b = -5
2a=-4
a=-2
b=3
a+2b = -2+2*3 = -2 + 6 = 4
2х+3х+4х=27
9х=27
х=3
самая маленькая- 2*3=6
самая большая- 4*3=12
разность- 12-6=6