Question

factorice 2x³+x²-2x-1​

Answer 1

Answer:

x2(2x+1)−1(2x+1)(x2−1)(2x+1)((x)−2(1)2)(2x+1)(x+1)(x−1)(2x+1)

Answer 2

Answer:

${\bf{\large{\tt{\blue{FACTORISATION:}}}}}$

$2 {x}^{3} + {x}^{2} - 2x - 1 \\ \\ = {x}^{2} (2x + 1) - 1(2x + 1) \\ \\ = ( {x}^{2} - 1) \times (2x + 1)$

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

${x}^{2} - 1 = 0 \\ = > {x}^{2} = 1 \\ = > x = 1 \: \: \: \\ or \\ x = - 1$

$2x + 1 = 0 \\ = > x = \frac{ - 1}{2}$