15x+2-3x(2x+1)=90

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Solution for 15x+2-3x(2x+1)=90 equation: 



15x+2-3x(2x+1)=90

We move all terms to the left:

15x+2-3x(2x+1)-(90)=0

We add all the numbers together, and all the variables

15x-3x(2x+1)-88=0

We multiply parentheses

-6x^2+15x-3x-88=0

We add all the numbers together, and all the variables

-6x^2+12x-88=0

a = -6; b = 12; c = -88;
Δ = b2-4ac
Δ = 122-4·(-6)·(-88)
Δ = -1968
Delta is less than zero, so there is no solution for the equation

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