Question

I just need #20

17, 18, 19 and 20 Show that the equation represents a sphere, and find its center and radius.
17. x2 + y? + z² – 2x – 4y + 8z = 15
Answer +
18. x2 + y? + z² + 8x – 6y + 2z + 17 = 0
19. 2x2 + 2y? + 222
8x – 24z + 1
Answer +
20. 3x2 + 3y? + 3z² = 10 + 6y + 12z
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Transcribed Image Text

17, 18, 19 and 20 Show that the equation represents a sphere, and find its center and radius. 17. x2 + y? + z² – 2x – 4y + 8z = 15 Answer + 18. x2 + y? + z² + 8x – 6y + 2z + 17 = 0 19. 2x2 + 2y? + 222 8x – 24z + 1 Answer + 20. 3x2 + 3y? + 3z² = 10 + 6y + 12z

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