Respuesta:
a) 8x + 1
b) 7x² - 23x - 20
Explicación paso a paso:
f(x) = 7x + 5
g(x) = x - 4
a) f(x) + g(x) = 7x + 5 + (x - 4) = 8x + 1
b) f(x) × g(x) = (7x + 5)(x - 4) = 7x² - 28x + 5x - 20 = 7x² - 23x - 20
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Respuesta:
a) 8x + 1
b) 7x² - 23x - 20
Explicación paso a paso:
f(x) = 7x + 5
g(x) = x - 4
a) f(x) + g(x) = 7x + 5 + (x - 4) = 8x + 1
b) f(x) × g(x) = (7x + 5)(x - 4) = 7x² - 28x + 5x - 20 = 7x² - 23x - 20