Transforme a forma geral da equação da circunferência em reduzida?

a) 2x² + 2y² + 4x - 8y + 9 = 0

b) x² + y² - 5x - 9y + 3/2

Respostas:

a) (x+1)² + (y-2)² = 1/2

b) (x-5/2)² + (y-9/2)² = 25

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