Show that 9x² - 12x + 4 = 0 has only one solution.
First method
9x² - 12x + 4 = 0
(3x - 2)² = 0
x = 2 / 3
Second method
9x² - 12x + 4 = 0
a = 9, b = -12 and c = 4
b² = 144
4ac = 144
b² = 4ac
-b / (2a) = 2 / 3
Show that 9x² - 12x + 4 = 0 has only one solution.
First method
9x² - 12x + 4 = 0
(3x - 2)² = 0
x = 2 / 3
Second method
9x² - 12x + 4 = 0
a = 9, b = -12 and c = 4
b² = 144
4ac = 144
b² = 4ac
-b / (2a) = 2 / 3
