2,1x^2=17,4

Solution for 2,1x^2=17,4 equation:

2.1x^2=17.4

We move all terms to the left:

2.1x^2-(17.4)=0

We add all the numbers together, and all the variables

2.1x^2-17.4=0

a = 2.1; b = 0; c = -17.4;
Δ = b2-4ac
Δ = 02-4·2.1·(-17.4)
Δ = 146.16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{146.16}}{2*2.1}=\frac{0-\sqrt{146.16}}{4.2}
=-\frac{\sqrt{}}{4.2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{146.16}}{2*2.1}=\frac{0+\sqrt{146.16}}{4.2}
=\frac{\sqrt{}}{4.2}
$