simplify under root 7 + under root 3i upon under root 7 - under root 3i + under root 7 - under root 3i and root 7 upon under root 3i is real?

Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]

What is the measure of angle tvu shown in the diagram below

It says factor each expression completely 8y+48