8a^2 - 4ab + 1/2b^2= 1/2(16a^2 - 8ab + b^2)=
1/2 *(4а-b)(4а-b)=1/2(4a-b)^2
8a² - 4ab + 1/2b²=
½(16a²-8ab+b²)=
½(4a-b)²
8a^2 - 4ab + 1/2b^2= 1/2(16a^2 - 8ab + b^2)=
1/2 *(4а-b)(4а-b)=1/2(4a-b)^2
8a² - 4ab + 1/2b²=
½(16a²-8ab+b²)=
½(4a-b)²