\[\boxed{\text{587\ (587).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[9x^{2} + 12x + 4 + 16x^{2} - 1 =\]
\[= 25x^{2} - 10x + 1\]
\[22x = - 2\]
\[x = - \frac{1}{11}\]
\[Ответ:\ x = - \frac{1}{11}.\]
\[- 2m = - 14\]
\[m = 7\]
\[Ответ:x = 7.\]
\[\boxed{\text{587.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 5(a + c) - b(a + c) =\]
\[= (a + c)(5 - b)\]
\[2)\ y(x + 2) - (x + 2) =\]
\[= (x + 2)(y - 1)\]
\[3)\ x^{2}(x + 1) + (x + 1) =\]
\[= (x + 1)(x^{2} + 1)\]