Question

Fractionise 20x^2-9x+1

Answer 1

$20 {x}^{2} - 9x + 1 \\ \\ = 20 {x}^{2} - 5x - 4x + 1 \\ \\ = 5x(4x - 1) - 1(4x - 1) \\ \\ = (5x - 1)(4x - 1)$
$\text{hence,}$
$\boxed{\boxed{\bold{(5x-1)(4x-1)}}}$

Answer 2

20x^2-9x+1
20x^2-4x-5x+1
4x(5x-1)-1(5x-1)
(5x-1)(4x-1)