Plug the y value in for y and plug the x value in for x
> less than
<u>></u> less than or equal to
Example:
(4,5)
y > 5y <u>></u> x
5 > 5x5 <u>></u> 4 = 5 > 25 <u>></u> 4 = false
they all should be false
if one had to be correct, I would say (0, 0)
I'm not quite sure but I'd say 1 and 4.
Answer:
centre = (- 3, - 2) , radius = 1
Step-by-step explanation:
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Given
x² + 6x + y² + 4y + 12 = 0 ( subtract 12 from both sides )
x² + 6x + y² + 4y = - 12
Use the method of completing the square on the x and y terms
add ( half the coefficient of the x/ y terms )² to both sides
x² + 2(3)x + 9 + y² + 2(2)y + 4 = - 12 + 9 + 4
(x + 3)² + (y + 2)² = 1 ← in standard form
with centre = (- (- 3), - (- 2)) and r² = 1, that is
centre = (- 3, - 2) and radius = 1
Answer:
?
Step-by-step explanation:
