х ^2+1,
(6х+1)^2-6
6x^2+1-6
6x^2-5
(х+1)в квадрате=хв квадрате+2х+1
6(х+1)^2-6
6(x^2+2x+1)-6
6x^2+12x+6-6
6x^2+12x=0
x(6x+12)=0
x=0; 6х+12=0
6х=-12
х=-2
х ^2+1,
(6х+1)^2-6
6x^2+1-6
6x^2-5
(х+1)в квадрате=хв квадрате+2х+1
6(х+1)^2-6
6(x^2+2x+1)-6
6x^2+12x+6-6
6x^2+12x=0
x(6x+12)=0
x=0; 6х+12=0
6х=-12
х=-2