Question

Please help me out friends

Answer 1

20x^2 -9x+1=20x^2 -4x-5x+1

=4x(5x-1)-1(5x-1)=(5x-1)(4x-1)

Answer 2

$= 20x^{2} - 4x - 5x + 1 \\ = 4x(5x - 1) - 1(5x - 1) \\ = (4x - 1)(5x - 1) \\ = > x = 1 \div 4 \: and \: x = 1 \div 5$