Question

1) 2x³-50=0
2) 16x³+8x²+x=0

Answer 1

1)

$2x {}^{3} = 50$

$x {}^{3} = 50$

$x = sqrt[3]{25}$

2)

$x times (16x {}^{2} + 8x + 1) = 0$

$x times (4 + 1) {}^{2} = 0$

$x = 0$

$(4x + 1) {}^{2} = 0$

$x = 0$

$x = - frac{1}{4}$

Answer 2

$2x^3-50=0\2(x^3-25)=0\x^3-25=0\x^3=25\x=+-sqrt[3]{25}$

$16x^3+8x^2+x=0\x(16x^2+8x+1)=0\x=0$ или

$16x^2+8x+1=0\D=64-4*16=0\x=frac{-8}{32} =-0,25$