\( f(x)=2\left(x^{2}+3 x-2\right) \) y \( g(x)=-2\left(x^{2}-3 x-2\right) \), se pue afirmar que el resultado de \( f(x)-g(x) \) es:

Let \( f(x)=\left(x-\frac{4}{5}\right)^{2} \). Find all values for the variable \( x \), for which \( f(x)=0 \)

Use factoring to solve the polynomial equation. \( a^{3}+2 a^{2}-9 a-18=0 \)

Let \( f(x)=x^{2}+2 x \), and \( g(x)=3 x+20 \). Find all values for the variable \( x \), for which \( f(x)=g(x) \). \( x=\square \)

5. If \( p(x) \) and \( q(x) \) are two polynomials such that \( p(x)+q(x)=x^{3}+x^{2}-x+4 \) and \( q(x)=x^{2}+b x \), which of the following could be \( p(x) \) ?

Find all values for the variable \( x \) such that \( f(x)=x \). \( f(x)=5 x+3 \)