(y^2-16)/(y^2+8y+16)

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Solution for (y^2-16)/(y^2+8y+16) equation: 


D( y )

y^2+8*y+16 = 0

y^2+8*y+16 = 0

y^2+8*y+16 = 0

y^2+8*y+16 = 0

DELTA = 8^2-(1*4*16)

DELTA = 0

y = -8/(1*2)

y = -4 or y = -4

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

(y^2-16)/(y^2+8*y+16) = 0

y^2+8*y+16 = 0

y^2+8*y+16 = 0

DELTA = 8^2-(1*4*16)

DELTA = 0

y = -8/(1*2)

y = -4 or y = -4

(y+4)^2 = 0

(y^2-16)/((y+4)^2) = 0

1*y^2 = 16 // : 1

y^2 = 16

y^2 = 16 // ^ 1/2

abs(y) = 4

y = 4 or y = -4

y in { -4} 

y = 4

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