Applicare la formula: $x^2+bx+c$$=x^2+bx+c+\left(\frac{b}{2}\right)^2-\left(\frac{b}{2}\right)^2$, dove $b=5$ e $c=-1$

Applicare la formula: $a^b$$=a^b$, dove $a=\frac{5}{2}$, $b=2$ e $a^b=\left(\frac{5}{2}\right)^2$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=25$, $b=4$, $c=-1$, $a/b=\frac{25}{4}$ e $ca/b=- \frac{25}{4}$

Applicare la formula: $\frac{a}{b}+c$$=\frac{a+cb}{b}$, dove $a/b+c=\left(x+\frac{5}{2}\right)^2-1-\frac{25}{4}$, $a=-25$, $b=4$, $c=-1$ e $a/b=-\frac{25}{4}$

Applicare la formula: $a+b$$=a+b$, dove $a=-25$, $b=-4$ e $a+b=-25-4$