Question

9x⁴ - (x²+2x+1)
factorise the above

Answer 1

$9 {x}^{4} - (x {}^{2} + 2x + 1) \\ = (3 {x}^{2}) {}^{2} - {(x + 1)}^{2} \\ = ({3x}^{2} + x + 1)( {3x}^{2} - x - 1)$

Answer 2

Hope this will help you .