can someone please help me? This is due today :(

Answer:
[tex] - 10 \sqrt{2} [/tex]
Step-by-step explanation:
[tex] - \sqrt{200} [/tex]
[tex] - \sqrt{ {10}^{2} \times 2 } [/tex]
[tex] - \sqrt{ {10}^{2} } \times \sqrt{2} [/tex]
[tex] - 10 \sqrt{2} [/tex]