Question

16x²-81=0 решить уравнение

Answer 1

$16 {x}^{2} - 81 = 0 \\ 16 {x}^{2} = 81 \\ {x}^{2} = \frac{81}{16} \\ x = + - \frac{9}{4}$

Answer 2

${16x}^{2} = 81$
${x}^{2} = \frac{81}{16}$
$x = + - \frac{9}{4}$