(v^2-3v-40)/(v+3)

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Solution for (v^2-3v-40)/(v+3) equation: 


D( v )

v+3 = 0

v+3 = 0

v+3 = 0

v+3 = 0 // - 3

v = -3

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

(v^2-(3*v)-40)/(v+3) = 0

(v^2-3*v-40)/(v+3) = 0

v^2-3*v-40 = 0

v^2-3*v-40 = 0

DELTA = (-3)^2-(-40*1*4)

DELTA = 169

DELTA > 0

v = (169^(1/2)+3)/(1*2) or v = (3-169^(1/2))/(1*2)

v = 8 or v = -5

(v+5)*(v-8) = 0

((v+5)*(v-8))/(v+3) = 0

( v+5 )

v+5 = 0 // - 5

v = -5

( v-8 )

v-8 = 0 // + 8

v = 8

v in { -5, 8 }

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