2. Resolver las inecuaciones
\( \begin{array}{l} \text { a) } 2(3-x) \leq 5-4 x \\ \text { b) }-3(x-1)>4(1-x) \\ \text { c) }-\frac{1}{2} x+1 \geq-\frac{3}{2} \\ \text { d) } \frac{1}{3}(1-2 x)<4 \\ \text { e) } 3 x+55-\frac{x}{6} \\ \text { h) } 7 \leq 2(3-x) \leq 9 \\ \text { i) } x^{2}+2 x \geq 15 \\ \text { j) } x^{2}-2 x-3 \leq 0\end{array} \)
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A) Vamos a resolver cada inecuación paso a paso: a) \( 2(3-x) \leq 5-4x \) \( 6 - 2x \leq 5 - 4x \) \( 2x \leq -1 \) \( x \geq -\frac{1}{2} \) b) \( -3(x-1) > 4(1-x) \) \( -3x + 3 > 4 - 4x \) \( x > -1 \) c) \( -\frac{1}{2}x + 1 \geq -\frac{3}{2} \) \( -\frac{1}{2}x \geq -\frac{5}{2} \) \( x \leq 5 \) d) \( \frac{1}{3}(1-2x) < 4 \) \( 1 - 2x < 12 \) \( -2x < 11 \) \( x > -\frac{11}{2} \) e) \( 3x + 5 < x + 13 \) \( 2x < 8 \) \( x < 4 \) f) \( 2(x-3) + 5(x-1) \geq -4 \) \( 2x - 6 + 5x - 5 \geq -4 \) \( 7x - 11 \geq -4 \) \( x \geq 1 \) g) \( \frac{x}{3} + \frac{x}{2} > 5 - \frac{x}{6} \) \( \frac{11x}{6} > 5 \) \( x > \frac{30}{11} \) h) \( 7 \leq 2(3-x) \leq 9 \) Si resolvemos ambas inecuaciones por separado: \( 7 \leq 6 - 2x \Rightarrow 2x \leq -1 \Rightarrow x \geq -\frac{1}{2} \) \( 6 - 2x \leq 9 \Rightarrow 2x \geq -3 \Rightarrow x \leq \frac{3}{2} \) Entonces, \( -\frac{1}{2} \leq x \leq \frac{3}{2} \) i) \( x^2 + 2x \geq 15 \) \( x^2 + 2x - 15 \geq 0 \) \( (x-3)(x+5) \geq 0 \) \( x \leq -5 \) o \( x \geq 3 \) j) \( x^2 - 2x - 3 \leq 0 \) \( (x-3)(x+1) \leq 0 \) \( -1 \leq x \leq 3 \) ¡Resolvamos con gracia y diversión, culminando un trabajo educativo excelente!