X2+1.8x-5.4=0

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Solution for X2+1.8x-5.4=0 equation:



X2+1.8X-5.4=0
We add all the numbers together, and all the variables
X^2+1.8X-5.4=0
a = 1; b = 1.8; c = -5.4;
Δ = b2-4ac
Δ = 1.82-4·1·(-5.4)
Δ = 24.84
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1.8)-\sqrt{24.84}}{2*1}=\frac{-1.8-\sqrt{24.84}}{2} $
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1.8)+\sqrt{24.84}}{2*1}=\frac{-1.8+\sqrt{24.84}}{2} $

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