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x^2-1.21=0
a = 1; b = 0; c = -1.21;
Δ = b2-4ac
Δ = 02-4·1·(-1.21)
Δ = 4.84
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{-(0)-\sqrt{4.84}}{2*1}=\frac{0-\sqrt{4.84}}{2} =-\frac{\sqrt{}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{4.84}}{2*1}=\frac{0+\sqrt{4.84}}{2} =\frac{\sqrt{}}{2} $
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