$\large{Primo}$ $\large{Esercizio}$
$x^{2}$ $+$ $\bigl($ $x$ $+$ $1$ $\bigr)^{2}$ $=$ $113$
$x^{2}$ $+$ $x^{2}$ $+$ $2x$ $+$ $1$ $=$ $113$
$2x^{2}$ $+$ $2x$ $=$ $112$
$2x$$\bigl($ $x$ $+$ $1$ $\bigr)$ $=$ $112$
$x$$\bigl($ $x$ $+$ $1$ $\bigr)$ $=$ $56$
$x^{2}$ $+$ $x$ $-$ $56$ $=$ $0$
$\Delta$ $=$ $b^{2}$ $-$ $4$$a$$c$ $\iff$ $\Delta$ $=$ $225$
$x_{1,2}$ $=$ $\displaystyle\frac{ - b \pm \sqrt{ \Delta } }{ 2a }$ $\iff$ $\displaystyle\frac{ - 1 \pm 15 }{ 2 }$ $\iff$ $\bigl($$x_{1}$ $=$ $-8$$\bigr)$ $\land$ $\bigl($ $x_{2}$ $=$ $7$$\bigr)$ $\iff$ $\bigl($ $x$ $=$ $7$ $\bigr)$ $\land$ $\bigl($ $x$ $+$ $1$ $=$ $8$$\bigr)$
$\large{Secondo}$ $\large{Esercizio}$
$\bigl($ $a$ $\bigr)$ $:$ $-x^{2}$ $+$ $\displaystyle\frac{1}{2}$$x$ $=$ $0$ $\iff$ $Soluzioni$ $:$ $\bigl($ $x$ $=$ $0$ $\bigr)$ $\lor$ $\bigl($ $x$ $=$ $\displaystyle\frac{1}{2}$ $\bigr)$
$\bigl($ $b$ $\bigr)$ $:$ $\displaystyle{1}{2}$$x^{2}$ $-$ $2x$ $=$ $3$ $\iff$ $Soluzioni$ $:$ $\bigl($ $x_{1}$ $=$ $1$ $+$ $\displaystyle\frac{ \sqrt{ 10 } }{2}$ $\bigr)$ $\land$ $\bigl($ $x_{2}$ $=$ $1$ $-$ $\displaystyle\frac{ \sqrt{ 10 } }{2}$ $\bigr)$
$\bigl($ $c$ $\bigr)$ $:$ $-2x^{2}$ $-$ $\displaystyle\frac{3}{2}$ $\iff$ $Soluzioni$ $:$ $Non$ $esistono$ $soluzioni$