\[\boxed{\text{98\ (98).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[- x^{2} = 2x - 3\]
\[x^{2} + 2x - 3 = 0\]
\[D_{1} = 1 + 3 = 4\]
\[x_{1,2} = - 1 \pm 2 = - 3;1.\]
\[y(1) = - 1^{2} = - 1;\]
\[y( - 3) = - ( - 3)^{2} = - 9.\]
\[\Longrightarrow Точки\ пересечения:\ \ \ \]
\[(1;\ - 1);\ \ ( - 3;\ - 9).\]
\[\boxed{\text{98.\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\textbf{а)}\ Нули\ функции:x = 3,1.\]
\[y < 0:\ - 6 \leq x < - 3;\ \ \]
\[\ 3,1 < x < 6.\ \]
\[y > 0:\ - 3 < x < 3,1.\]
\[возрастает:\lbrack - 6; - 3);\ \ ( - 3;0).\]
\[убывает:(0;6).\]
\[D(f) = \lbrack - 6;\ - 3) \cup ( - 3;6);\]
\[E(f) = ( - 5;4\rbrack.\]
\[\textbf{б)}\ Нули\ функции:x = - 7;\]
\[x = - 1;x = 1;x = 3.\]
\[y < 0:( - 7;0);(1;3).\]
\[y > 0:\lbrack - 8; - 7);(0;1);(3;4\rbrack.\]
\[возрастает:( - 4;0);(2;4\rbrack.\]
\[убывает:\lbrack - 8; - 4);(0;2).\]
\[D(f) = \lbrack - 8;4\rbrack;\ \]
\[E(f) = \lbrack - 5;7\rbrack.\]