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196x^2-121=0
a = 196; b = 0; c = -121;
Δ = b2-4ac
Δ = 02-4·196·(-121)
Δ = 94864
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{94864}=308$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-308}{2*196}=\frac{-308}{392} =-11/14 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+308}{2*196}=\frac{308}{392} =11/14 $
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