Distribute the negative sign: -(x - 6y)

Can somebody me out with this question

32a³b² 8ab² simplify the following expression.

In isosceles right triangle $abc$, point $d$ is on hypotenuse $\overline{bc}$ such that $\overline{ad}$ is an altitude of $\triangle abc$ and $dc = 5$. what is the area of triangle $abc$?