7c^2=343

Solution for 7c^2=343 equation:

7c^2=343

We move all terms to the left:

7c^2-(343)=0

a = 7; b = 0; c = -343;
Δ = b2-4ac
Δ = 02-4·7·(-343)
Δ = 9604
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$c_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$c_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{9604}=98$
$c_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-98}{2*7}=\frac{-98}{14}
=-7
$
$c_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+98}{2*7}=\frac{98}{14}
=7
$