Resolvemos este problema algebraico.
[tex]f(x) = {x}^{2} - 4 \\ g(x) = 2x + 1 \\ \\ f - g \\ \\ ( {x}^{2} - 4) - (2x + 1) \\ \\ {x}^{2} - 4 - 2x - 1 \\ \\ = \boxed{ \pink{{x}^{2} - 2x - 5}}[/tex]
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Dadas las funciones: f(x)=x²-4 y g(x)=2x+1, obtener f-g
Resolvemos este problema algebraico.
[tex]f(x) = {x}^{2} - 4 \\ g(x) = 2x + 1 \\ \\ f - g \\ \\ ( {x}^{2} - 4) - (2x + 1) \\ \\ {x}^{2} - 4 - 2x - 1 \\ \\ = \boxed{ \pink{{x}^{2} - 2x - 5}}[/tex]
Espero que te sirva cumpa.