Question

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

Answer 1

Step-by-step explanation:

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

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