Show that 25x² - 20x + 4 = 0 has only one solution.
First method
25x² - 20x + 4 = 0
(5x - 2)² = 0
x = 2 / 5
Second method
25x² - 20x + 4 = 0
a = 25, b = -20 and c = 4
b² = 400
4ac = 400
b² = 4ac
-b / (2a) = 2 / 5
Solving the fifth quadratic equation, featuring Mighty and Sonic
Author
shwapneel1999
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- Publish Time：2021-12-01 02:21
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