Question

The equation of a circle is x2 + y2 + Cx + Dy = E. If the radius of the circle is decreased without changing the coordinates of the center point, how are the coefficients C, D, and E affected?

Answer 1

C and D give the coordinates of the center
E = the square of the radius.

Answer 2

@welshfella So... would it be C and D are unchanged, but E decreases.

Answer 3

exactly right

Answer 4

Yay! Thanks!

Answer 5

yw

Answer 6

OH i#m not at my best today
sorry

i was thinking about the other form of the circle (x - A)^2 and (y - B)^2 = r^2

I'l have to think about that
SORRY!

Answer 7

No thats OK
what i said is OK

Answer 8

the center will be (-0.5C, (-0.5D) so C and D will not change and the radius is
sqrt ( (0.5C)^2 + 0.5D^2 - E) - so if radius decreases so will the value of E.

Answer 9

@welshfella Wait... so my answer was right or wrong?

Answer 10

it was right C and D are unchanged but E decreases

Answer 11

@welshfella wew lad I thought I had it wrong, Thank you so much

Answer 12

hold on...

Answer 13

@welshfella Even if its wrong thank you for your time

Answer 14

I think i ought to go to bed as i'mn not thinking straight.
the radius is sqrt ( squares of C and D MINUS E) so as the squares stay the same and radius decreases then E must INCREASE
Do you agree?

Answer 15

I agree with that but, the thing is, I already clicked next lol, but its ok dude, don't worry

Answer 16

oh ok
yw

Answer 17

I#m taking a break!! lol