Question

solve x^2-10x+9=0 for x​

Answer 1

$x^{2} -10x+9=0$

$x^{2} -9x-x+9=0$

$x(x-9)-1(x-9)=0$

$(x-1)(x-9)=0$

$x=1$

$x=9$

Answer 2

Explanation:

x^2-10x+9=0

x^2-x-9x+9=0

x (x-1)-9(x-1)=0

(x-1)(x-9)=0

x=1 or x=9

x=9is correct because it satisfies above condition