Find all values of a such that (a-3)/sqrta=-sqrta

From the Pythagorean theorem...

[ distance between (a, 7)  and  (2, 1) ]2   =   [a - 2]2  +  [7 - 1]2

And they tell us that the distance equals  3√5  , so

[  3√5 ]2   =   [a - 2]2  +  [7 - 1]2

45   =   [a - 2]2  +  36

9   =   [a - 2]2

±√9  =   a - 2

± 3   =   a - 2

± 3  +  2   =   a

a  =  3 + 2  =  5          or          a = -3 + 2  =  -1

and

5  +  -1   =   4

Step-by-step explanation:

hope dis helps

step-by-step explanation:

faster, im not sure why but i know it is faster