(x+2)(x-6)-(x-7)(x+7) больше 30-3x пж помогите

[latex](x+2)(x-6)-(x-7)(x+7)\ \textgreater \ 30-3x[/latex] [latex]x^2+2x-6x-12-(x^2-49)\ \textgreater \ 30-3x[/latex] [latex]x^2+2x-6x-12-x^2+49\ \textgreater \ 30-3x[/latex] [latex]-4x+37\ \textgreater \ 30-3x[/latex] [latex]-4x+3x\ \textgreater \ 30-37[/latex] [latex]-x\ \textgreater \ -7[/latex] [latex]x\ \textless \ 7[/latex] ------------------(7)-------------- //////////////////// Ответ: [latex](-[/latex] ∞ [latex];7)[/latex]