Question

Solve the equation x^{3}-8x^{2}-20x=0

Answer 1

`x(x {}^(2) - 8x - 20) = 0`

Use the quadratic formula to simply the second degree equation;

`x(x + 2)(x - 10)`

`x1 = 0`

`x2 = - 2`

`x3 = 10`