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2019 WAEC Further Mathematics Theory Find the equation of the circle centre (2. 3) which passes through the y -...

Further Mathematics
WAEC 2019

Find the equation of the circle centre (2. 3) which passes through the y - intercept of the line 3x  - 2y + 6 = 0

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Explanation

At y-intercept, 3(0) — 2y + 6 = 0 and solving for y, y = 3.

Therefore, the coordinates of y — intercept is (0, 3).

Then, r\(^2\) =  (0 — 2)\(^2\) + (3 — 3)\(^2\) = 4. With the centre at (2, 3). the equation of the circle was (x — 2)\(^2\) + (y — 3)\(^2\) = 4 and which simplified to \(x^2\) - y\(^2\) — 4x — 6y + 9 = 0


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