(a^2-28)/(a-5)

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Solution for (a^2-28)/(a-5) equation: 


D( a )

a-5 = 0

a-5 = 0

a-5 = 0

a-5 = 0 // + 5

a = 5

a in (-oo:5) U (5:+oo)

(a^2-28)/(a-5) = 0

1*a^2 = 28 // : 1

a^2 = 28

a^2 = 28 // ^ 1/2

abs(a) = 2*7^(1/2)

a = 2*7^(1/2) or a = -(2*7^(1/2))

a in { 2*7^(1/2), -(2*7^(1/2)) }

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