Question

${x}^{2} - 324 = 0$
equação incompleta de segundo grau
ajude-me!​

Answer 1

${x}^{2} - 324 = 0$

$x = \frac{ - 0 + - \sqrt{ {0}^{2} - 4 \times 1 \times ( - 324)} }{2 \times 1}$

$x = \frac{ + - \sqrt{0 + 1296} }{2}$

$x = \frac{ + - \sqrt{1296} }{2}$

$x = \frac{ + - 36}{2}$

$x = \frac{36}{2} = 18 \\ x = \frac{ - 36}{2} = - 18$

Answer 2

x² - 324 = 0

x²= 0 + 324

x²= 324

x= ± √324

x= ± 18

S= ( 18 , - 18)