URGENT MATH HELP NEEDED PLEASE HELP!

[Ahmed Iqbal123]

In a triangle ABC with vertices A(2,-1) and B(-1,1), the gradient of AC and AB are 2m and m respectively, find the coordinates of C if BAC = 90 degree

 

[Varun_bzl]

In a triangle ABC with vertices A(2,-1) and B(-1,1), the gradient of AC and AB are 2m and m respectively, find the coordinates of C if BAC = 90 degree

Post a picture of the question or recheck it properly. Something seems wrong in it.

 

[Susanna28973]

The question is wrong. If angle BAC = 90; the product of gradient of AC and gradient of AB should be equal to -1.