Question

3+23y_8y2 factorise it

Answer 1

$3 + 23y - 8 y {2} = 0 \\ 8y { }^{2} - 23y - 3 = 0 \\ 8 {y}^{2} - (24 - 1)y - 3 = 0 \\ 8 {y}^{2} - 24y + y - 3 = 0 \\8y(y - 3) + 1(y - 3) = 0 \\ (y - 3)(8y + 1) \\ y = 3 \\ y = - 1 \div 8$