\[\boxed{\text{307\ (307).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[y = x^{2}\]
\[1)\ a = 0;b = 6:\]
\[y = x^{2} + 6.\]
\[2)\ a = - 9;b = 0:\]
\[y = (x - 9)^{2}.\]
\[3)\ a = 0;b = - 12:\]
\[y = x^{2} - 12.\]
\[4)\ a = 7;b = 0:\]
\[y = (x + 7)^{2}.\]
\[5)\ a = - 2;b = - 3:\]
\[y = (x - 2)^{2} - 3.\]
\[6)\ a = 1;b = 1:\]
\[y = (x + 1)^{2} + 1.\]