Question

procedimiento porfas​

Answer 1

「 Rpta. 」L = 9 ; Q = 7/3

Reducimos:

L = (x + 5)² - (x + 4)² - 2x

L = x² + 10x + 25 - (x + 4)² - 2x

L = x² + 10x + 25 - (x² + 8x + 16) - 2x

L = x² + 10x + 25 - x² - 8x - 16 - 2x

L = 10x + 25 - 8x - 16 - 2x

L = 10x - 8x - 2x + 25 - 16

L = 2x - 2x + 25 - 16

L = 25 - 16

L = 9

Hallamos el valor simplificado:

$\bf Q= \dfrac{(x+7)^{2} -(x-7)^{2}}{(x + 3)^{2}-(x-3)^{2}}= \dfrac{2\cdot14x}{2\cdot6x}=\bf \dfrac{14x}{6x}=\bf \dfrac{14}{6}=\bf \dfrac{7}{3}\qquad\qquad \qquad$