Find midpoint of segment.
(-1,1), (7,-5)

Find slope of line which passes through (-1,1) and (7,-5).

The slope of perpendicular line is negative reciprocal value of m.

Write quation of line which slope is

and passes throug the point (3,-2).
For 61 you can change it to √25/√49. √25=5 and √49=7 so it would simplify to 5/7.
the given expression is :
2(4√16x) - 2(4√2y) + 34√81x - 4(4√32y)
⇒ 8(√16x) - 8(√2y) + 34√81x - 16√32y
⇒8×4√x - 8√2y + 34×9√x - 16√16×2y [∵ √16 = 4 and √81 = 9]
⇒32√x - 8√2y + 306√x - 16×4√2y
⇒(32√x + 306√x) - 8√2y - 16×4√2y
⇒338√x -72√2y