[tex]Given\;:\sqrt{-18} - \sqrt{-32}[/tex]
we know that i² = -1
[tex]\implies\sqrt{18}i - \sqrt{32}i\\[/tex]
[tex]\implies 3\sqrt{2}i - 4\sqrt{2}i[/tex]
[tex]\implies -i\sqrt{2}[/tex]
Answer:
#3 is the answer
Step-by-step explanation:
