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If f(x)=8x−5𝑓(𝑥)=8𝑥−5and g(x)=9x2−7x+6𝑔(𝑥)=9𝑥2−7𝑥+6, what is (g−f)(x)(𝑔−𝑓)(𝑥)?

Question

If f(x)=8x−5𝑓(𝑥)=8𝑥−5and g(x)=9x2−7x+6𝑔(𝑥)=9𝑥2−7𝑥+6, what is (g−f)(x)(𝑔−𝑓)(𝑥)?

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Solution

Para resolver la función (gf)(x)(g - f)(x), primero debemos entender que esto significa restar la función f(x)f(x) de la función g(x)g(x).

Dado: f(x)=8x5f(x) = 8x - 5 g(x)=9x27x+6g(x) = 9x^2 - 7x + 6

Entonces, (gf)(x)(g - f)(x) se calcula de la siguiente manera:

(gf)(x)=g(x)f(x) (g - f)(x) = g(x) - f(x)

Sustituyendo las funciones dadas:

(gf)(x)=(9x27x+6)(8x5) (g - f)(x) = (9x^2 - 7x + 6) - (8x - 5)

Ahora, distribuimos el signo negativo a través de la segunda función:

(gf)(x)=9x27x+68x+5 (g - f)(x) = 9x^2 - 7x + 6 - 8x + 5

Luego, combinamos los términos semejantes:

(gf)(x)=9x27x8x+6+5 (g - f)(x) = 9x^2 - 7x - 8x + 6 + 5

(gf)(x)=9x215x+11 (g - f)(x) = 9x^2 - 15x + 11

Por lo tanto, la función (gf)(x)(g - f)(x) es:

(gf)(x)=9x215x+11 (g - f)(x) = 9x^2 - 15x + 11

This problem has been solved

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