Question 74853
You've got it. Not the route I would take, but it gets you to the answer nonetheless. I would've factored the left side to easily solve for x.


{{{x^2-9*x-10=0}}} What 2 numbers multiply to -10 and add to -9. They are -10 and 1
{{{(x+1)(x-10)=0}}}Factor the left side
{{{x+1=0}}}Set each factor equal to 0
{{{x=-1}}}There's one answer
{{{x-10=0}}}
{{{x=10}}}There's the other answer
So x=-1 or x=10

But if it works for you then you should stick with it.