Rational, 2 a \( \frac{\sqrt{1+x}+\sqrt{x}}{\sqrt{1+x}-\sqrt{x}} \)

\[ h(x)=x^{3}+a x^{2}+b x+c \] The function \( h \) is defined above, where \( a, b \), and \( c \) are integer constants. If the zeros of the function are \( -5,6 \), and 7 , what is the value of \( c \) ?

(4) \( (x+3)^{3}=343 \)

в) \( \left\{\begin{array}{l}4 x-7 y=30 \\ 4 x-5 y=90\end{array}\right. \)

25. Expresa en la forma radical y halla el resultado atencia con exponente fraccionario \( \begin{array}{lll}\text { a) } 64^{\frac{1}{2}} & \text { b) }(-125)^{-\frac{1}{3}} & \text { c) }\left(256 x^{3} y^{2}\right)^{\frac{4}{7}}\end{array} \)

742. Нишон дихед, ки \( 2 a-b-(2 b-a)-3(a-b) \)