Question

If the distance between the point A(a, -) and B(5,3) be 5 units , find the value of 'a'. the answer is a = 5 please give the full explanation​

Answer 1

Answer:

Distance=(x2−x1)2+(y2−y1)2)

P=(x1,y1)=(x,−1)

Q=(x2,y2)=(3,2)

25=(3−x)2+(2+1)2

25=(9+x2−6x+9)

x2−6x−7=0

x2−7x+x−7=0

x(x−7)+1(x−7)=0

x=−1,7