The expression 2x^3 + x^2 - 2x - 1 = 0 is divisible by

• Quant Quadratic

The expression 2x³ + x² - 2x - 1 = 0 is divisible by

1. 2x - 1
2. 2x + 1
3. x + 2
4. x - 2

Answer

2x³ + x² - 2x - 1 = x²(2x + 1) - (2x + 1) = (x² - 1)(2x + 1)

So, given expression is divisible by (2x + 1)

The correct option is B.