7x(-3x-4)=16

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Solution for 7x(-3x-4)=16 equation: 



7x(-3x-4)=16

We move all terms to the left:

7x(-3x-4)-(16)=0

We multiply parentheses

-21x^2-28x-16=0

a = -21; b = -28; c = -16;
Δ = b2-4ac
Δ = -282-4·(-21)·(-16)
Δ = -560
Delta is less than zero, so there is no solution for the equation

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