Jawabannya ada diatas yaa
Penjelasan dengan langkah-langkah:4x² + 4y² - 8x + 12y = 3x² + y² - 2x + 3y = ¾(x² - 2x + 1) - 1 + (y² + 3y + (3/2)²) - (3/2)² = 3(x - 1)² + (y + (3/2))² = 3 + 1 + (3/2)²(x - 1)² + (y - (-3/2))² = 4 + (9/4)(x - 1)² + (y - (-3/2))² = 25/4Titik pusat = (1, - 3/2)Jari-jari = V(25/4)Jari-jari = 5/2 = 2 ½