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4x² + 16x - 15 + 4y² + 6y = 0
Sederhanakanlah, maka:
=> 4(x² + 4x) + 4(y² + ) = 15
Gunakan rumus kuadrat sempurna, maka:
=> 4(x + 2)² + 4(y+)² = 15 + 16 +
=> (x+2)² + (y+)² =
Titik pusat lingkarannya adalah dan jejarinya = 2,8
Semoga membantu