Question

Знайди корень рівняння.
x² = 324​

Answer 1

$x {}^{2} = 324 \\ x {}^{2} - 324 = 0 \\ d = 0 {}^{2} - 4 \times 1 \times ( - 324) = \sqrt{} 1296 = 36 \\ x1 = \frac{36}{2} = 18 \\ x2 = \frac{ - 36}{2} = - 18$

Answer 2

$x {}^{2} = 324 \\ x = ± \sqrt{324} \\ x = ±18$

$x = 18 \\ x = - 18$

$otvet. \\ x1 = 18 \\ x2 = - 18$