Show that 4x² - 12x + 9 = 0 has only one solution.
First method
4x² - 12x + 9 = 0
(2x - 3)² = 0
x = 3 / 2
Second method
4x² - 12x + 9 = 0
a = 4, b = -12 and c = 9
b² = 144
4ac = 144
b² = 4ac
-b / (2a) = 3 / 2
Solving the first quadratic equation, featuring Amy and Tangle
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- 发布时间：2021-12-01 02:11
