(x + 2)² = 9
(x - 1)²= 0
(x - 1)²= -16
(y -3)² = 36
(x + 2)² = 9 => x² + 2x + 4 = 9 => x² + 4x - 5 = 0
(x - 1)² = 0 => x² - 2x + 1 = 0
(x - 1)² = -16 => x² - 2x + 1 = -16 => x² - 2x + 17 = 0
(y - 3)² = 36 => y² - 6y + 9 = 36 => y² - 6y - 27 = 0
Comments
(x + 2)² = 9 => x² + 2x + 4 = 9 => x² + 4x - 5 = 0
(x - 1)² = 0 => x² - 2x + 1 = 0
(x - 1)² = -16 => x² - 2x + 1 = -16 => x² - 2x + 17 = 0
(y - 3)² = 36 => y² - 6y + 9 = 36 => y² - 6y - 27 = 0