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tankabanditka [31]
3 years ago
6

P2 + 4p - 12 = 0 Find the value of the discriminant. A) 2 B) 4 C) 8 D) 64

Mathematics
1 answer:
Nezavi [6.7K]3 years ago
8 0

Answer:

D

Step-by-step explanation:

given p² + 4p - 12 = 0 ← in standard form

with a = 1, b = 4, c = - 12, then the discriminant

Δ = b² - 4ac

 = 4² - (4 × 1 × - 12) = 16 - (- 48) = 16 + 48 = 64 → D

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Step-by-step explanation:

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Write an equation of the circle that has a diameter with endpoints (12, 3) and<br> (-18,3).
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The equation of the circle that has a diameter with endpoints (12, 3) and(-18,3) is x² + y² + 6x - 6y - 207 = 0

<h3>Coordinates of center of circle</h3>

Since the endpoints of the diameter are (x₁, y₁) = (12,3) and (x₂, y₂) = (-18,3), the coordinates of the center of the circle are the midpoints of the diameter. So, the midpoints are

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So, the coordinates of the center of the circle are (-3, 3)

<h3>The radius of the circle</h3>

The radius of the circle r = √[(x₁ - h)² + (y₁ - k)²] where

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So, substituting the values of the variables into r, we have

r = √[(x₁ - h)² + (y₁ - k)²]

r = √[(12 - (-3))² + (3 - 3)²]

r = √[(12 + 3)² + 0²]

r = √[15² + 0²]

r = √15²

r = 15

<h3>The equation of the circle</h3>

The equation of a circle with center (h,k) is given by

(x - h)² + (y - k)² = r² where r = radius of circle.

Substituting the values of the variables into the equation, we have

(x - h)² + (y - k)² = r²

(x - (-3))² + (y - 3)² = 15²

(x + 3)² + (y - 3)² = 15²

x² + 6x + 9 + y² - 6y + 9 = 225

x² + 6x + y² - 6y + 9 + 9 - 225 = 0

x² + y² + 6x - 6y - 207 = 0

The equation of the circle that has a diameter with endpoints (12, 3) and(-18,3) is x² + y² + 6x - 6y - 207 = 0

Learn more about equation of a circle here:

brainly.com/question/18435467

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