Question

Помогите с этими 2 заданиями!!!!!

Answer 1

а)

$x ^{2} - 64 = 0 \\ {x}^{2} = 64 \\ x = 8$
$x ^{2} + 3 = 0 \\ {x}^{2} = - 3 \\ x = - \sqrt{3}$

б)
${x}^{2} - 3x = 0 \\ x(x - 3) = 0 \\ x = 0 \\ x - 3 = 0 \\ x = 3$
${x}^{2} - 9 = 0 \\ {x}^{2} = 9 \\ x = 3$