\[\boxed{\text{353\ (353).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ x^{2} = x - 1\]
\[y = x^{2}\]
\[x\] | \[1\] | \[2\] | \[3\] | \[- 1\] | \[- 2\] |
---|---|---|---|---|---|
\[y\] | \[1\] | \[4\] | \[9\] | \[1\] | \[4\] |
\[y = x - 1\]
\[x\] | \[0\] | \[1\] |
---|---|---|
\[y\] | \[- 1\] | \[0\] |
\[Ответ:нет\ корней.\]
\[2)\ x^{2} - 2x - 3 = 0\]
\[x^{2} = 2x + 3\]
\[y = x^{2}\]
\[x\] | \[1\] | \[2\] | \[3\] | \[- 1\] | \[- 2\] |
---|---|---|---|---|---|
\[y\] | \[1\] | \[4\] | \[9\] | \[1\] | \[4\] |
\[y = 2x + 3\]
\[x\] | \[1\] | \[- 1\] | \[3\] |
---|---|---|---|
\[y\] | \[5\] | \[1\] | \[9\] |
\[Ответ:\ x = - 1;x = 3.\]
\[3)\ x^{2} = \frac{8}{x}\]
\[y = x^{2}\]
\[x\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
---|---|---|---|---|
\[y\] | \[1\] | \[4\] | \[1\] | \[4\] |
\[y = \frac{8}{x}\]
\[x\] | \[2\] | \[4\] | \[8\] | \[- 2\] | \[- 4\] | \[- 8\] |
---|---|---|---|---|---|---|
\[y\] | \[4\] | \[2\] | \[1\] | \[- 4\] | \[- 2\] | \[- 1\] |
\[Ответ:x = 2.\]