find a point P on y axis which is equidistant from the point A (48) and B (minus 66) also find the distance of AP About the author Amara
Answer: As the point is on y axis therefore let the coordinates of P be( 0,y) As it is equidistant from A(4,8) and B(-6,6),by distance formula (0-4)^2+(y-8)^2= (0+6)^2+(y-6)^2 i.e. 16 + y^2 – 16y+ 64 = 36 + y^2 – 12y + 36 i.e -16y + 80 = 72 – 12y i.e 80-72 = -12y + 16y i.e. 8 = 4y i.e y = 8/4 i.e y = 2 Therefore the coordinates of P are 0 and 2 i.e P(0,2) Now distance between P(0,2) and A(4,8) by distance formula AP= √(4-0)^2+(8-2)^2 i.e AP = √16+ 36 i.e AP = √52 i.e AP is √52= 2√13 Reply
Answer:
As the point is on y axis therefore let the coordinates of P be( 0,y)
As it is equidistant from A(4,8) and B(-6,6),by distance formula
(0-4)^2+(y-8)^2= (0+6)^2+(y-6)^2
i.e. 16 + y^2 – 16y+ 64 = 36 + y^2 – 12y + 36
i.e -16y + 80 = 72 – 12y
i.e 80-72 = -12y + 16y
i.e. 8 = 4y
i.e y = 8/4
i.e y = 2
Therefore the coordinates of P are 0 and 2
i.e P(0,2)
Now distance between P(0,2) and A(4,8) by distance formula
AP= √(4-0)^2+(8-2)^2
i.e AP = √16+ 36
i.e AP = √52
i.e AP is √52= 2√13