2x(7x+2)=0

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Solution for 2x(7x+2)=0 equation:



2x(7x+2)=0
We multiply parentheses
14x^2+4x=0
a = 14; b = 4; c = 0;
Δ = b2-4ac
Δ = 42-4·14·0
Δ = 16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{16}=4$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4}{2*14}=\frac{-8}{28} =-2/7 $
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4}{2*14}=\frac{0}{28} =0 $

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