find the points on the y axis,each of which
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in y- axis x = 0
so, ( 0, y) is the point which distance from (-5, 7 ) = 13 units
use distance formula,
√{(0+5)² + (y-7)²} = 13
take square both sides
5² + (y-7)² = 13²
(y-7)² = 13² -5² = 169-25 = 144 =12²
(y -7)² =12²
take square root
(y -7) = ± 12
y = 7± 12 = 19 , -5
so, ( 0, y) is the point which distance from (-5, 7 ) = 13 units
use distance formula,
√{(0+5)² + (y-7)²} = 13
take square both sides
5² + (y-7)² = 13²
(y-7)² = 13² -5² = 169-25 = 144 =12²
(y -7)² =12²
take square root
(y -7) = ± 12
y = 7± 12 = 19 , -5
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