-21+6x=3(3x-5)x

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Solution for -21+6x=3(3x-5)x equation: 



-21+6x=3(3x-5)x

We move all terms to the left:

-21+6x-(3(3x-5)x)=0



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

3(3x-5)x

We multiply parentheses

9x^2-15x

Back to the equation:

-(9x^2-15x)



We get rid of parentheses

-9x^2+6x+15x-21=0

We add all the numbers together, and all the variables

-9x^2+21x-21=0

a = -9; b = 21; c = -21;
Δ = b2-4ac
Δ = 212-4·(-9)·(-21)
Δ = -315
Delta is less than zero, so there is no solution for the equation

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