Respuesta :

I find it easier just to graph this sort of question rather than multiply it all out.

x = 3.5

_____
(x^2 +2x +1) -(x^2 -6x +9) = 20
.. 8x -8 = 20
.. x = 28/8 = 3.5
Ver imagen sqdancefan

Answer:

Step-by-step explanation:

All I know is x=3.5 is wrong