Question

Which expression is a factor of 10x2 – X -2?

Answer 1

Factorise the expression.

`\begin{gathered} 10x^2-x-2=10x^2-5x+4x-2 \\ =5x(2x-1)+2(2x-1) \\ =(5x+2)(2x-1) \end{gathered}`

So (5x + 2) and (2x - 1) are factors of the equation. Thus option B is correct.