luckilyalexa
27.07.2021 •
Mathematics
Complete the square to rewrite the following equation. Identify the center and radius of the circle. You must show all work and calculations to receive credit x^2 - 4x + y^2 + 8y = -4
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Ответ:
x ² - 4x + y ² + 8y = -4
(x ² - 4x + 4) + (y ² + 8y + 16) = -4 + 4 + 16
(x - 2)² + (y + 4)² = 16
(x - 2)² + (y + 4)² = 4²
which is the equation of a circle centered at (2, -4) and with radius 4.
Ответ: