4/(a+3)+2/3a

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Solution for 4/(a+3)+2/3a equation: 


D( a )

a+3 = 0

a+3 = 0

a+3 = 0

a+3 = 0 // - 3

a = -3

a in (-oo:-3) U (-3:+oo)

4/(a+3)+(2/3)*a = 0

4/(a+3)+(2*a)/3 = 0

(3*4)/(3*(a+3))+(2*a*(a+3))/(3*(a+3)) = 0

2*a*(a+3)+3*4 = 0

2*a^2+6*a+12 = 0

2*a^2+6*a+12 = 0

2*(a^2+3*a+6) = 0

a^2+3*a+6 = 0

DELTA = 3^2-(1*4*6)

DELTA = -15

DELTA < 0

2 = 0

2/(3*(a+3)) = 0

2/(3*(a+3)) = 0 // * 3*(a+3)

2 = 0

a belongs to the empty set

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