Simplify into two \( 2 x^{2}-2 x-4 \)

В) \( \log _{5}^{2}(2 x)-20 \log _{5}(2 x)=21 \).

Divide the expression. \( \frac{6 x^{4}-2 x^{2}+6}{x^{2}+2} \) \( \frac{6 x^{4}-2 x^{2}+6}{x^{2}+2}=\square \) (Simplify your answer.)

4.2 Homework \[ \begin{array}{l}\text { Factor } f(x) \text { into linear factors given that } k \text { is a zero of } f(x) \text {. } \\ f(x)=3 x^{3}+13 x^{2}-118 x+72 ; k=4 \\ f(x)=\square \text { (Factor completely.) }\end{array} \]

Factor \( P(x) \) into linear factors given that \( k \) is a zero of \( P \). \( P(x)=x^{3}-2 x^{2}-7 x-4 ; k=-1 \) \( x^{3}-2 x^{2}-7 x-4=\square \) (Type your answer in factored form.)

Determina per quare valore di a la funzlone \( y=\frac{x}{a-x} \) ha dominio \( D: x \neq-2 \). \( P(2 ; 5) \). \[ [a=8, b=2 \mid \]