Question

реши уравнение:2√x-3=6
1.нет решения
2.20,25
3.6,25
4.2,25​

Answer 1

$2\sqrt{x} - 3 = 6\\\\2\sqrt{x} = 6 + 3\\\\2\sqrt{x} = 9\\\\\sqrt{x} = \frac{9}{2} \\\\\sqrt{x} = 4.5\\x = 4.5^{2} \\\\x = 20.25$

2)20.25