Question

factorise x² -2x -9​

Answer 1

Answer:

$1 + \sqrt{10}$

Step-by-step explanation:

by quadratic formula-

$x = - b + - \sqrt{ {b}^{2} -4ac } \div (2a)$

therefore x = 2+-root40 ÷2

x= 1+root10

i hope it helped