(x+3)^2=(x-9)^2;
x^2+6x+9= x^2-18x+81;
x^2+6x-x^2+18x= 81-9;
24x=72;
x=72:24;
x=3
(x+3)²=(x-9)²
х²+6х+9=х²-18х+81
6х+18х=81-9
24х=72
х=3
(x+3)^2=(x-9)^2;
x^2+6x+9= x^2-18x+81;
x^2+6x-x^2+18x= 81-9;
24x=72;
x=72:24;
x=3
(x+3)²=(x-9)²
х²+6х+9=х²-18х+81
6х+18х=81-9
24х=72
х=3