Answer:
Center ( 4 , -2) and r = 6
Step-by-step explanation:
x² - 8x + y² + 4y - 16 = 0
x² - 8x + y² + 4 y = 16
x²- 2*4x + y² + 2 *2y = 16
(x² - 2*4x + 16 ) - 16 + (y² + 2*2y + 4) -4 = 16
(x - 4)² + (y + 2)² = 16 + 16 + 4
(x - 4)² + (y -[-2])² = 36
(x- 4)² + ( y - [-2] )² = 6²
Compare with (x - h)²+ (y - k)² = r²
Center ( 4 , -2) and r = 6
52 + 23 + 10 + 78 = 78 + 10 + 23 + 52
This is basically the commutative property of addition....a + b = b + a....stating that even if u move the numbers around, if they are the same numbers, the answer will come out the same.
Circle and Parabola.
Ellipse and Hyperbola are also other types of conic sections.
Answer:
need to see the question
Step-by-step explanation:
