78=-3b(5b-5)

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Solution for 78=-3b(5b-5) equation: 



78=-3b(5b-5)

We move all terms to the left:

78-(-3b(5b-5))=0



We calculate terms in parentheses: -(-3b(5b-5)), so:

-3b(5b-5)

We multiply parentheses

-15b^2+15b

Back to the equation:

-(-15b^2+15b)



We get rid of parentheses

15b^2-15b+78=0

a = 15; b = -15; c = +78;
Δ = b2-4ac
Δ = -152-4·15·78
Δ = -4455
Delta is less than zero, so there is no solution for the equation

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