(a^2+8a-20)/(a-2)

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Solution for (a^2+8a-20)/(a-2) equation: 


D( a )

a-2 = 0

a-2 = 0

a-2 = 0

a-2 = 0 // + 2

a = 2

a in (-oo:2) U (2:+oo)

(a^2+8*a-20)/(a-2) = 0

a^2+8*a-20 = 0

a^2+8*a-20 = 0

DELTA = 8^2-(-20*1*4)

DELTA = 144

DELTA > 0

a = (144^(1/2)-8)/(1*2) or a = (-144^(1/2)-8)/(1*2)

a = 2 or a = -10

(a+10)*(a-2) = 0

a+10 = 0

a+10 = 0 // - 10

a = -10

a = -10

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