Fully Simplify (multiplying imaginary numbers)
(-3_/-63) (9_/7)

See attachment for math work and answer.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

hello! just here for points! though i wish i knew!