Hallar la solucion de las sig. ecuaciones. \( x^{3}+5 x^{2}+6 x=0 \) \( 3 x^{2}+12=0 \) \( x^{3}-8 x^{2}+21 x-20=0 \) \( x^{2}+25=0 \) \( x^{4}+4 x^{3}+28 x^{2}-4 x-29=0 \) \( x^{4}+3 x^{2}-10=0 \) \( x^{4}+2 x^{2}+1=0 \) \( x^{6}-9 x^{3}+8=0 \) \( 2 x^{2}-x+3=0 \)

expunencial \( \left.\left(4^{2}\right)\left(2^{3}\right)^{2 x-5}\right)=8 \)

Exercice N1 \( \begin{array}{lll}\text { Simplifier les expressions suivantes puis calculer leur valeur: } \\ \begin{array}{lll}\text { 1. } a=5^{1,7} \times 5^{1,3} & \text { 2. } b=\left(2^{-\frac{1}{5}}\right)^{6} & \text { 3. } c=4^{-0,7} \times \times \frac{1}{4^{0,3}}\end{array} & \text { 4. } d=\frac{6^{4,5} \times 6^{2,3}}{\left(6^{1,6}\right)^{3}}\end{array} \)

f) \( (-15 a b c+12 a b-9 a c-3 a) \div(-3 a) \)

3. At a school, \( 40 \% \) of the sikthegrade students said that hip-hop is their favorite kind of music. If 100 sixth-gade students preler hip hop music, how many sixth-grade studer are at the school? Explain or show your reasoning.

Find \( x \). \( \frac{x-1}{3}=\frac{5}{x}+1 \) A. 6.36 OR -2.36 (B) 6.36 (C) 5.46 OR 2.36 (D) No real roots