(-2/5)a=6

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Solution for (-2/5)a=6 equation: 



(-2/5)a=6

We move all terms to the left:

(-2/5)a-(6)=0



Domain of the equation: 5)a!=0

a!=0/1

a!=0

a∈R



We multiply parentheses

-2a^2-6=0

a = -2; b = 0; c = -6;
Δ = b2-4ac
Δ = 02-4·(-2)·(-6)
Δ = -48
Delta is less than zero, so there is no solution for the equation

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