Question

if x^2+y^2+2gx+2fy-12=0 represents a circle with centre (-4,-3) then find g, f and the radius of the circle​

Answer 1

Step-by-step explanation:

8. If x2 + y2 +2gx+2fy-12=0 represents a circle with centre (2,3) find g, f and

9. If x2 + y2 + 2gx+2fy=0 represents a circle with centre (-4,-3) then find 8, fanc

centre of the circle.

circle.

10. If x2 + y2–4x+6y+c=0 represents a circle with radius 6 then find the value of

n. Find the centre and radius of each of the circles whose equations are given below

(i) x2 + y2 - 4x – 8y-41 = 0

(i) 3x2 + 3y2 -- 5x - 6y +4=0

(ii) 3x2 + 3y2 + 6x - 12y- 1 = 0

(iv) x2 + y2 + 6x + 8y-96=0

(v) 2x2 + 2y2 - 4x + 6y – 3 = 0

(vi) 2x2 + 2y2 – 3x + 2y-1=0

vii) V1+ m2 (x2 + y2) – 2cx -- 2mcy = 0

(viii) x2 + y2 + 2ax - 2y + b2 = 0.

12. Find the equations of the circles for which the points given below are the end poi

(i) (1,2), (4,6)

(i) (-4,3), (3,-4)

Answer 2

Answer:

Step-by-step explanation:

centre (-4,-3)=(-g,-f)

so,here g=4 and f=3

radius = under root g^2+f^2-c

so under root 4^2+3^2+12=16+9+12=37

so the radius of the circle is r=37