Question

I can't figure out how to do this question. simplify the imaginary number in the picture above please

Answer 1

Answer:

  -i(6/7)√2

Step-by-step explanation:

$\displaystyle -\sqrt{-\frac{72}{49}}=-\sqrt{-1}\sqrt{\frac{36}{49}}\sqrt{2}\\\\=-i\frac{6}{7}\sqrt{2}$