2014 · Q6
The expression 2x^3 + x^2 - 2x - 1 is divisible by
Elementary MathematicsAlgebra
- Ax + 2
- B2x + 1
- Cx - 2
- D2x - 1
Explanation
Factorising: x^2(2x+1) - 1(2x+1) = (x^2-1)(2x+1), so 2x+1 is a factor.
The expression 2x^3 + x^2 - 2x - 1 is divisible by
Explanation
Factorising: x^2(2x+1) - 1(2x+1) = (x^2-1)(2x+1), so 2x+1 is a factor.