The length of a line segment joining A(3,y) and B(7,5) is 5 units. Find the possible value of y.

      

The length of a line segment joining A(3,y) and B(7,5) is 5 units. Find the possible value of y.

  

Answers

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Length of a line

= $\sqrt{(x_1-x_2)^2+(y_1-y_2)}$

= 25 = (3 -7)² + (y - 5)²

= 25 = 16 + y² - 10y + 25

y² - 10y + 16 = 0

P = 16

S = -10 N = -8 -2

(y2 -8y) -(2y + 16) = 0

y(y - 8) -(2y + 16) = 0

(y - 2)(y - 8) = 0

y = 2 or y = 8

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johnmulu answered the question on June 13, 2017 at 07:48

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