Show that 25x² - 30x + 9 = 0 has only one solution.
First method
25x² - 30x + 9 = 0
(5x - 3)² = 0
x = 3 / 5
Second method
25x² - 30x + 9 = 0
a = 25, b = -30 and c = 9
b² = 900
4ac = 900
b² = 4ac
-b / (2a) = 3 / 5
Show that 25x² - 30x + 9 = 0 has only one solution.
First method
25x² - 30x + 9 = 0
(5x - 3)² = 0
x = 3 / 5
Second method
25x² - 30x + 9 = 0
a = 25, b = -30 and c = 9
b² = 900
4ac = 900
b² = 4ac
-b / (2a) = 3 / 5
