Question

Please help! Variables!!

Answer 1

Answer:

-x^4, and (2√x)/x

Step-by-step explanation:

4. $- \sqrt{ x^{8} } = - \sqrt{x^{4} *x^{4} } = -x^{4}$

x^8 = x*x*x*x*x*x*x*x = (x*x*x*x)(x*x*x*x) = (x^4)(x^4)

5.

$\sqrt{\frac{4}{x} } = \frac{\sqrt{4} }{\sqrt{x} } = \frac{2}{\sqrt{x} } \\\\\\\frac{2}{\sqrt{x} } * \frac{\sqrt{x} }{\sqrt{x} } = \frac{2\sqrt{x} }{x}$