(Зх-2)²=9х²-12х+4
(0.6m-n)²=0,36m²-1.2mn+n²
(a+2b)²=a²+4ab+b²
(х+1)(x^2-x+1)-x(x-3)(x+3)=62
х³+1-х(х²-9)=62
х³+1-х³+9х=62
9х=61
х=6 7/9
(Зх-2)²=9х²-12х+4
(0.6m-n)²=0,36m²-1.2mn+n²
(a+2b)²=a²+4ab+b²
(х+1)(x^2-x+1)-x(x-3)(x+3)=62
х³+1-х(х²-9)=62
х³+1-х³+9х=62
9х=61
х=6 7/9