[tex]\sqrt{8}- \sqrt{32}+ \sqrt{50}= \\ \\ \sqrt{8}= \sqrt{ 2^{3}}=2 \sqrt{2} \\ \\ \sqrt{32} = \sqrt{2^{5} }=4 \sqrt{2} \\ \\ \sqrt{50}= 5 \sqrt{2} \\ \\ \sqrt{8}- \sqrt{32}+ \sqrt{50}=2 \sqrt{2}-4 \sqrt{2} +5 \sqrt{2} = \sqrt{2}(2-4+5)= 3\sqrt{2} [/tex]
