Question

(2x+5)/(x^(2 )+6x+9 )+ x/(x^(2 )-9)+ 1/(x-3 ) =

Answer 1

Respuesta:$2x + 5 /x ^2 + 6x + 9 + x / x^2 - 9 + 1/ x - 3\\5 / x^2 + x / x^2 + 6x + 1 / x = - 9 + 3\\x^2 + x^2 + x + 6x + x = - 9 + 3*5 *1\\2x^2 + 8x = - 30\\f(x) 2x^2 = 4x + 8x = - 30\\12x = - 30\\x = - 30 / 12\\x = - 2.5$

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