3. Explain the error in the following problem: SOLVE: \( x-2=\sqrt{2 x-4} \) Square both sides. \( (x-2)^{2}=(\sqrt{2 x-4})^{2} \) \( x^{2}-4 x+4=2 x-4 \) \( x^{2}-6 x+8=0 \) \( (x-2)(x-4)=0 \) \( x=2 ; x=4 \)

An angle measures \( 82^{\circ} \) more than the measure of its supplementary angle. What is the measure of each angle? \[ \square^{\circ} \text { and } \square^{\circ} \]

10. Jika \( g(x)=x+3 \) dan \( (f \circ g)(x)=x^{2}-4 \), maka \( f(x) \) adalah \( \begin{array}{l}\text { A. } \\ \text { B. } x^{2}-1 \\ \text { C. } x^{2}-6 x-5 \\ \text { D. } x^{2}-6 x+5 \\ \text { E. } x^{2}+6 x+5\end{array} \)

1. If \( f(x)=5 x \) and \( g(x)=x-3 \), what is the value of \( f(3)-g(4) ? \)

11. Эгерде \( \left(7^{x}+7^{x}\right)^{3}=56 \) болсо, анда \( x= \) ? А) 1 Б) \( \frac{2}{3} \) В) \( \frac{1}{3} \) Г) \( \frac{1}{6} \) Д) \( \frac{1}{9} \)

3 times as much as the sum of \( \frac{3}{4} \) and \( \frac{2}{4} \)