(y^2-6y+8)/(y^2+3y-28)

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Solution for (y^2-6y+8)/(y^2+3y-28) equation: 


D( y )

y^2+3*y-28 = 0

y^2+3*y-28 = 0

y^2+3*y-28 = 0

y^2+3*y-28 = 0

DELTA = 3^2-(-28*1*4)

DELTA = 121

DELTA > 0

y = (121^(1/2)-3)/(1*2) or y = (-121^(1/2)-3)/(1*2)

y = 4 or y = -7

y in (-oo:-7) U (-7:4) U (4:+oo)

(y^2-(6*y)+8)/(y^2+3*y-28) = 0

(y^2-6*y+8)/(y^2+3*y-28) = 0

y^2-6*y+8 = 0

y^2-6*y+8 = 0

DELTA = (-6)^2-(1*4*8)

DELTA = 4

DELTA > 0

y = (4^(1/2)+6)/(1*2) or y = (6-4^(1/2))/(1*2)

y = 4 or y = 2

(y-2)*(y-4) = 0

y^2+3*y-28 = 0

y^2+3*y-28 = 0

DELTA = 3^2-(-28*1*4)

DELTA = 121

DELTA > 0

y = (121^(1/2)-3)/(1*2) or y = (-121^(1/2)-3)/(1*2)

y = 4 or y = -7

(y+7)*(y-4) = 0

((y-2)*(y-4))/((y+7)*(y-4)) = 0

( y-2 )

y-2 = 0 // + 2

y = 2

( y-4 )

y-4 = 0 // + 4

y = 4

y in { 4} 

y = 2

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