(v^2-7v-78)/(v+4)

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Solution for (v^2-7v-78)/(v+4) equation: 


D( v )

v+4 = 0

v+4 = 0

v+4 = 0

v+4 = 0 // - 4

v = -4

v in (-oo:-4) U (-4:+oo)

(v^2-(7*v)-78)/(v+4) = 0

(v^2-7*v-78)/(v+4) = 0

v^2-7*v-78 = 0

v^2-7*v-78 = 0

DELTA = (-7)^2-(-78*1*4)

DELTA = 361

DELTA > 0

v = (361^(1/2)+7)/(1*2) or v = (7-361^(1/2))/(1*2)

v = 13 or v = -6

(v+6)*(v-13) = 0

((v+6)*(v-13))/(v+4) = 0

( v+6 )

v+6 = 0 // - 6

v = -6

( v-13 )

v-13 = 0 // + 13

v = 13

v in { -6, 13 }

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