Answer:
-9 = -10x
x = -1
Step-by-step explanation:
[tex]x=14.7, -0.7[/tex]
[tex]x^2-10x-9=2x\\x^2-12x-9=0\\x^2-12x=9\\(x^2-12x+36)=45\\(x-6)^2=45\\\sqrt{(x-6)^2}=\sqrt{45} \\x-6=6.7\\x-6=-6.7\\x=14.7, -0.7[/tex]
