Solve. \( \begin{array}{l}\ln (5 x+25)=\ln (4 x+18) \\ \text { A. } x=\square \text { (Simplify your answer. Use a comma to separate answers as needed.) } \\ \text { B. There is no solution. }\end{array} \).

Simplify the following expressions fully: \( 1.2 .1 \quad(x+2)\left(x^{2}-x+3\right) \)

FACTORIZAR APLICANDO CASOS COMBINADOS DE FACTDRES A) \( \cdot x^{3}+5 x^{2}-4 x-20 \) B) \( \cdot 75 x^{5}+60 x^{4}+12 x^{3} \) C) \( \cdot 2 x^{2}-18 \) d) \( x^{3}+x^{2}-9 x-9 \) e) \( x^{4}-81 \)

1.Решить уравнение: \( \begin{array}{lll}\text { a) } \sqrt{x+3}=\sqrt{5-x} & \text { б) } \quad \sqrt{12+3 x}=2 & \text { в) } \quad x=1+\sqrt{x+11}\end{array} \)

(ס) \( \frac{4(a-9)}{36(9-a) x^{3}} \)

5. Solve \( x^{2}+4 x+3>0 \)