Question

Помогите решить,умоляю.
x³-25x=0
x²<16
2x²-x-15>0

Answer 1

${x}^{3} - 25 = 0$
$x( {x}^{2} - 25) = 0$
$x =0$
или
${x}^{2} - 25 = 0$
$x = 5 \: x = - 5$
${x}^{2} < 16$
$x < 4 \: \: x < - 4$