(11x+77)/(x^2+7x)

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Solution for (11x+77)/(x^2+7x) equation: 


D( x )

x^2+7*x = 0

x^2+7*x = 0

x^2+7*x = 0

x^2+7*x = 0

DELTA = 7^2-(0*1*4)

DELTA = 49

DELTA > 0

x = (49^(1/2)-7)/(1*2) or x = (-49^(1/2)-7)/(1*2)

x = 0 or x = -7

x in (-oo:-7) U (-7:0) U (0:+oo)

(11*x+77)/(x^2+7*x) = 0

x^2+7*x = 0

x*(x+7) = 0

x+7 = 0 // - 7

x = -7

x*(x+7) = 0

(11*x+77)/(x*(x+7)) = 0

11*x+77 = 0 // - 77

11*x = -77 // : 11

x = -77/11

x = -7

x in { -7} 

x belongs to the empty set

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