Prove: slope of AC x slope of DC = -1.

Solution:

To find the slope, m, of a straight line, the formula is

For line AC,

Picking coordinates from the graph

Substitute the coordinates into the formula to find the slope, m, of a straight line

For line DC

Picking coordinates from the graph

Substitute the coordinates into the formula to find the slope, m₁, of a straight line

Line AC and DC are perpendicular, i.e.

Hence,

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.