Simplify the radical expression by factoring out the largest perfect nth power. Assume that all variables are positive. 25) \( \sqrt{245 x^{2}} \) If possible, simplify the expression and combine like terms. If any variables exist, assume that they are positive. 26) \( -8 \sqrt{2}-7 \sqrt{50} \) Multiply, then simplify the product. If variables are present, assume they are positive. \( 27)(\sqrt{2}-6)(\sqrt{5}-2) \)

Use the properties of logarithms to expand the expression. \( \ln \left(5 m^{6}\right) \) \( \ln \left(5 m^{6}\right)=\square \)

\( \left.<x<\frac{5}{13}\right) \quad \begin{array}{ll}\text { a) }\left(-3 \frac{5}{8}+7,6\right)-\left(10,8-8 \frac{3}{4}\right) ; & \text { b) }-\left(5 \frac{4}{9}-6 \frac{5}{12}\right)+\left(-3 \frac{2}{3}-\frac{5}{9}\right)\end{array} \)

BÀI TÂP CUỐ CHƯON 1. Sử dựng số nguyên âm để thề hiện các tình huống sau: a) Nợ 150 nghìn đồng; b) 600 m dưới mực nước biển; c) 12 độ dưới \( 0^{\circ} \mathrm{C} \).

Write \( \sqrt{-200} \) in simplest radical form.

Clark has been given seven tasks to do al work, but she has tume to complete only four them. She mus decide in what order to do the ack. How many possible onderings of foum tasks are avalable to Soraya?