Respuesta :

Answer:

5 or -2

Step-by-step explanation:

simplify this to make it easier.

[tex]x^{2} +2x-2x-4=3x+6\\[/tex]

then combine like terms

[tex]x^{2} -4=3x+6[/tex]

now move everything over to the right

[tex]x^{2} -3x-10=0[/tex]

then if you factor it, you get

[tex](x-5)(x+2)[/tex]

x can equal 5 or -2

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